diff --git a/src/libs/qmljs/qmljsdocument.cpp b/src/libs/qmljs/qmljsdocument.cpp
index 9387423e38b..38ab1af0454 100644
--- a/src/libs/qmljs/qmljsdocument.cpp
+++ b/src/libs/qmljs/qmljsdocument.cpp
@@ -119,9 +119,9 @@ Document::~Document()
         delete _engine;
 }
 
-Document::Ptr Document::create(const QString &fileName, Language language)
+Document::MutablePtr Document::create(const QString &fileName, Language language)
 {
-    Document::Ptr doc(new Document(fileName, language));
+    Document::MutablePtr doc(new Document(fileName, language));
     doc->_ptr = doc;
     return doc;
 }
@@ -375,11 +375,11 @@ void Snapshot::remove(const QString &fileName)
     }
 }
 
-Document::Ptr Snapshot::documentFromSource(const QString &code,
-                                           const QString &fileName,
-                                           Document::Language language) const
+Document::MutablePtr Snapshot::documentFromSource(
+        const QString &code, const QString &fileName,
+        Document::Language language) const
 {
-    Document::Ptr newDoc = Document::create(fileName, language);
+    Document::MutablePtr newDoc = Document::create(fileName, language);
 
     if (Document::Ptr thisDocument = document(fileName)) {
         newDoc->_editorRevision = thisDocument->_editorRevision;
diff --git a/src/libs/qmljs/qmljsdocument.h b/src/libs/qmljs/qmljsdocument.h
index 4f7ca3e7272..c06d8451064 100644
--- a/src/libs/qmljs/qmljsdocument.h
+++ b/src/libs/qmljs/qmljsdocument.h
@@ -51,7 +51,8 @@ class Snapshot;
 class QMLJS_EXPORT Document
 {
 public:
-    typedef QSharedPointer<Document> Ptr;
+    typedef QSharedPointer<const Document> Ptr;
+    typedef QSharedPointer<Document> MutablePtr;
 
     // used in a 3-bit bitfield
     enum Language
@@ -68,7 +69,7 @@ protected:
 public:
     ~Document();
 
-    static Document::Ptr create(const QString &fileName, Language language);
+    static MutablePtr create(const QString &fileName, Language language);
     static Language guessLanguageFromSuffix(const QString &fileName);
 
     Document::Ptr ptr() const;
@@ -230,7 +231,7 @@ public:
     QList<Document::Ptr> documentsInDirectory(const QString &path) const;
     LibraryInfo libraryInfo(const QString &path) const;
 
-    Document::Ptr documentFromSource(const QString &code,
+    Document::MutablePtr documentFromSource(const QString &code,
                                      const QString &fileName,
                                      Document::Language language) const;
 };
diff --git a/src/libs/qmljs/qmljsscopechain.cpp b/src/libs/qmljs/qmljsscopechain.cpp
index 378e2abbfa1..a3746c30408 100644
--- a/src/libs/qmljs/qmljsscopechain.cpp
+++ b/src/libs/qmljs/qmljsscopechain.cpp
@@ -259,7 +259,7 @@ void ScopeChain::initializeRootScope()
 
     m_globalScope = valueOwner->globalObject();
 
-    QHash<Document *, QmlComponentChain *> componentScopes;
+    QHash<const Document *, QmlComponentChain *> componentScopes;
     QmlComponentChain *chain = new QmlComponentChain(m_document);
     m_qmlComponentScope = QSharedPointer<const QmlComponentChain>(chain);
 
@@ -297,7 +297,7 @@ void ScopeChain::initializeRootScope()
 void ScopeChain::makeComponentChain(
         QmlComponentChain *target,
         const Snapshot &snapshot,
-        QHash<Document *, QmlComponentChain *> *components)
+        QHash<const Document *, QmlComponentChain *> *components)
 {
     Document::Ptr doc = target->document();
     if (!doc->qmlProgram())
diff --git a/src/libs/qmljs/qmljsscopechain.h b/src/libs/qmljs/qmljsscopechain.h
index 70d123b5ca8..786e7defd99 100644
--- a/src/libs/qmljs/qmljsscopechain.h
+++ b/src/libs/qmljs/qmljsscopechain.h
@@ -108,7 +108,7 @@ private:
     void update() const;
     void initializeRootScope();
     void makeComponentChain(QmlComponentChain *target, const Snapshot &snapshot,
-                            QHash<Document *, QmlComponentChain *> *components);
+                            QHash<const Document *, QmlComponentChain *> *components);
 
 
     Document::Ptr m_document;
diff --git a/src/plugins/qmldesigner/designercore/filemanager/astobjecttextextractor.h b/src/plugins/qmldesigner/designercore/filemanager/astobjecttextextractor.h
index a70e205ae24..073c8fa9fcf 100644
--- a/src/plugins/qmldesigner/designercore/filemanager/astobjecttextextractor.h
+++ b/src/plugins/qmldesigner/designercore/filemanager/astobjecttextextractor.h
@@ -52,7 +52,7 @@ protected:
     virtual bool visit(QmlJS::AST::UiObjectDefinition *ast);
 
 private:
-    QmlJS::Document::Ptr m_document;
+    QmlJS::Document::MutablePtr m_document;
     quint32 m_location;
     QString m_text;
 };
diff --git a/src/plugins/qmldesigner/designercore/filemanager/firstdefinitionfinder.h b/src/plugins/qmldesigner/designercore/filemanager/firstdefinitionfinder.h
index 94485fae2b2..7ba3d9bd011 100644
--- a/src/plugins/qmldesigner/designercore/filemanager/firstdefinitionfinder.h
+++ b/src/plugins/qmldesigner/designercore/filemanager/firstdefinitionfinder.h
@@ -54,7 +54,7 @@ protected:
     void extractFirstObjectDefinition(QmlJS::AST::UiObjectInitializer* ast);
 
 private:
-    QmlJS::Document::Ptr m_doc;
+    QmlJS::Document::MutablePtr m_doc;
     quint32 m_offset;
     QmlJS::AST::UiObjectDefinition *m_firstObjectDefinition;
 
diff --git a/src/plugins/qmldesigner/designercore/filemanager/objectlengthcalculator.h b/src/plugins/qmldesigner/designercore/filemanager/objectlengthcalculator.h
index cdb8e523336..a9e4c22e890 100644
--- a/src/plugins/qmldesigner/designercore/filemanager/objectlengthcalculator.h
+++ b/src/plugins/qmldesigner/designercore/filemanager/objectlengthcalculator.h
@@ -52,7 +52,7 @@ protected:
     virtual bool visit(QmlJS::AST::UiObjectDefinition *ast);
 
 private:
-    QmlJS::Document::Ptr m_doc;
+    QmlJS::Document::MutablePtr m_doc;
     quint32 m_offset;
     quint32 m_length;
 };
diff --git a/src/plugins/qmldesigner/designercore/filemanager/qmlrefactoring.cpp b/src/plugins/qmldesigner/designercore/filemanager/qmlrefactoring.cpp
index e3da2593820..12df3ba4a9b 100644
--- a/src/plugins/qmldesigner/designercore/filemanager/qmlrefactoring.cpp
+++ b/src/plugins/qmldesigner/designercore/filemanager/qmlrefactoring.cpp
@@ -61,7 +61,7 @@ bool QmlRefactoring::reparseDocument()
 
 //    qDebug() << "QmlRefactoring::reparseDocument() new QML source:" << newSource;
 
-    Document::Ptr tmpDocument(Document::create("<ModelToTextMerger>", Document::QmlLanguage));
+    Document::MutablePtr tmpDocument(Document::create("<ModelToTextMerger>", Document::QmlLanguage));
     tmpDocument->setSource(newSource);
 
     if (tmpDocument->parseQml()) {
diff --git a/src/plugins/qmldesigner/designercore/include/rewriterview.h b/src/plugins/qmldesigner/designercore/include/rewriterview.h
index d4ee5cccb2a..85ba6778ab6 100644
--- a/src/plugins/qmldesigner/designercore/include/rewriterview.h
+++ b/src/plugins/qmldesigner/designercore/include/rewriterview.h
@@ -188,7 +188,7 @@ public:
     bool renameId(const QString& oldId, const QString& newId);
 
     const QmlJS::ScopeChain &scopeChain() const;
-    QmlJS::Document *document() const;
+    const QmlJS::Document *document() const;
 
     QString convertTypeToImportAlias(const QString &type) const;
 
diff --git a/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp b/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp
index b76e9e6ea5c..178341e7122 100644
--- a/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp
+++ b/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp
@@ -382,7 +382,7 @@ private:
 
     //storing the pointer would not be save
     QmlJS::ContextPtr context() const;
-    QmlJS::Document *document() const;
+    const Document *document() const;
 
     QPointer<Model> m_model;
     static QHash<QString, Pointer> m_nodeMetaInfoCache;
@@ -496,7 +496,7 @@ QmlJS::ContextPtr NodeMetaInfoPrivate::context() const
     return QmlJS::ContextPtr(0);
 }
 
-QmlJS::Document *NodeMetaInfoPrivate::document() const
+const QmlJS::Document *NodeMetaInfoPrivate::document() const
 {
     if (m_model && m_model->rewriterView()) {
         return m_model->rewriterView()->document();
diff --git a/src/plugins/qmldesigner/designercore/model/modeltotextmerger.cpp b/src/plugins/qmldesigner/designercore/model/modeltotextmerger.cpp
index 4bf2d49cfef..1ed9d9c96e9 100644
--- a/src/plugins/qmldesigner/designercore/model/modeltotextmerger.cpp
+++ b/src/plugins/qmldesigner/designercore/model/modeltotextmerger.cpp
@@ -229,7 +229,7 @@ void ModelToTextMerger::applyChanges()
     if (m_rewriteActions.isEmpty())
         return;
 
-    Document::Ptr tmpDocument(Document::create(QLatin1String("<ModelToTextMerger>"), Document::QmlLanguage));
+    Document::MutablePtr tmpDocument(Document::create(QLatin1String("<ModelToTextMerger>"), Document::QmlLanguage));
     tmpDocument->setSource(m_rewriterView->textModifier()->text());
     if (!tmpDocument->parseQml()) {
         qDebug() << "*** Possible problem: QML file wasn't parsed correctly.";
diff --git a/src/plugins/qmldesigner/designercore/model/rewriterview.cpp b/src/plugins/qmldesigner/designercore/model/rewriterview.cpp
index e3e5f7b6e14..8eb75507652 100644
--- a/src/plugins/qmldesigner/designercore/model/rewriterview.cpp
+++ b/src/plugins/qmldesigner/designercore/model/rewriterview.cpp
@@ -629,7 +629,7 @@ const QmlJS::ScopeChain &RewriterView::scopeChain() const
     return textToModelMerger()->scopeChain();
 }
 
-QmlJS::Document *RewriterView::document() const
+const QmlJS::Document *RewriterView::document() const
 {
     return textToModelMerger()->document();
 }
diff --git a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
index ae3f345100f..de38527effa 100644
--- a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
+++ b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
@@ -732,7 +732,7 @@ bool TextToModelMerger::load(const QString &data, DifferenceHandler &differenceH
     try {
         Snapshot snapshot = m_rewriterView->textModifier()->getSnapshot();
         const QString fileName = url.toLocalFile();
-        Document::Ptr doc = Document::create(fileName.isEmpty() ? QLatin1String("<internal>") : fileName, Document::QmlLanguage);
+        Document::MutablePtr doc = Document::create(fileName.isEmpty() ? QLatin1String("<internal>") : fileName, Document::QmlLanguage);
         doc->setSource(data);
         doc->parseQml();
 
diff --git a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.h b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.h
index 48df79258aa..ebd2817cfa8 100644
--- a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.h
+++ b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.h
@@ -71,7 +71,7 @@ public:
     const QmlJS::ScopeChain &scopeChain() const
     { return *m_scopeChain; }
 
-    QmlJS::Document *document() const
+    const QmlJS::Document *document() const
     { return m_document.data(); }
 
 protected:
diff --git a/src/plugins/qmljseditor/qmlexpressionundercursor.cpp b/src/plugins/qmljseditor/qmlexpressionundercursor.cpp
index 60e90b60deb..686ed040c8d 100644
--- a/src/plugins/qmljseditor/qmlexpressionundercursor.cpp
+++ b/src/plugins/qmljseditor/qmlexpressionundercursor.cpp
@@ -136,9 +136,11 @@ QmlJS::AST::ExpressionNode *QmlExpressionUnderCursor::operator()(const QTextCurs
     ExpressionUnderCursor expressionUnderCursor;
     _text = expressionUnderCursor(cursor);
 
-    exprDoc = Document::create(QLatin1String("<expression>"), Document::JavaScriptLanguage);
-    exprDoc->setSource(_text);
-    exprDoc->parseExpression();
+    Document::MutablePtr newDoc = Document::create(
+                QLatin1String("<expression>"), Document::JavaScriptLanguage);
+    newDoc->setSource(_text);
+    newDoc->parseExpression();
+    exprDoc = newDoc;
 
     _expressionNode = exprDoc->expression();
 
diff --git a/src/plugins/qmljseditor/qmljsfindreferences.cpp b/src/plugins/qmljseditor/qmljsfindreferences.cpp
index 557fbca3def..5f197a73ce1 100644
--- a/src/plugins/qmljseditor/qmljsfindreferences.cpp
+++ b/src/plugins/qmljseditor/qmljsfindreferences.cpp
@@ -810,8 +810,8 @@ static void find_helper(QFutureInterface<FindReferences::Usage> &future,
         else
             language = QmlJSTools::languageOfFile(fileName);
 
-        Document::Ptr newDoc = snapshot.documentFromSource(it.value().first, fileName,
-                                                           language);
+        Document::MutablePtr newDoc = snapshot.documentFromSource(
+                    it.value().first, fileName, language);
         newDoc->parse();
         snapshot.insert(newDoc);
     }
diff --git a/src/plugins/qmljseditor/qmljssemanticinfoupdater.cpp b/src/plugins/qmljseditor/qmljssemanticinfoupdater.cpp
index dc7dfde82a4..c00012ccf8d 100644
--- a/src/plugins/qmljseditor/qmljssemanticinfoupdater.cpp
+++ b/src/plugins/qmljseditor/qmljssemanticinfoupdater.cpp
@@ -128,10 +128,12 @@ SemanticInfo SemanticInfoUpdater::semanticInfo(const SemanticInfoUpdaterSource &
             language = m_lastSemanticInfo.document->language();
         else
             language = QmlJSTools::languageOfFile(source.fileName);
-        doc = snapshot.documentFromSource(source.code, source.fileName, language);
-        doc->setEditorRevision(source.revision);
-        doc->parse();
-        snapshot.insert(doc);
+        QmlJS::Document::MutablePtr newDoc = snapshot.documentFromSource(
+                    source.code, source.fileName, language);
+        newDoc->setEditorRevision(source.revision);
+        newDoc->parse();
+        snapshot.insert(newDoc);
+        doc = newDoc;
     }
 
     SemanticInfo semanticInfo;
diff --git a/src/plugins/qmljstools/qmljsmodelmanager.cpp b/src/plugins/qmljstools/qmljsmodelmanager.cpp
index 16ccc076511..164f7607146 100644
--- a/src/plugins/qmljstools/qmljsmodelmanager.cpp
+++ b/src/plugins/qmljstools/qmljsmodelmanager.cpp
@@ -598,7 +598,7 @@ void ModelManager::parse(QFutureInterface<void> &future,
             }
         }
 
-        Document::Ptr doc = Document::create(fileName, language);
+        Document::MutablePtr doc = Document::create(fileName, language);
         doc->setEditorRevision(documentRevision);
         doc->setSource(contents);
         doc->parse();
diff --git a/src/plugins/qmljstools/qmljsrefactoringchanges.cpp b/src/plugins/qmljstools/qmljsrefactoringchanges.cpp
index c86f51a482e..944cbbbe025 100644
--- a/src/plugins/qmljstools/qmljsrefactoringchanges.cpp
+++ b/src/plugins/qmljstools/qmljsrefactoringchanges.cpp
@@ -135,8 +135,9 @@ Document::Ptr QmlJSRefactoringFile::qmljsDocument() const
         const QString name = fileName();
         const Snapshot &snapshot = data()->m_snapshot;
 
-        m_qmljsDocument = snapshot.documentFromSource(source, name, languageOfFile(name));
-        m_qmljsDocument->parse();
+        Document::MutablePtr newDoc = snapshot.documentFromSource(source, name, languageOfFile(name));
+        newDoc->parse();
+        m_qmljsDocument = newDoc;
     }
 
     return m_qmljsDocument;