diff --git a/src/plugins/cpptools/builtineditordocumentparser.cpp b/src/plugins/cpptools/builtineditordocumentparser.cpp
index 55c9c6d9ed5..d802e672505 100644
--- a/src/plugins/cpptools/builtineditordocumentparser.cpp
+++ b/src/plugins/cpptools/builtineditordocumentparser.cpp
@@ -50,8 +50,10 @@ static QByteArray overwrittenToolchainDefines(const ProjectPart &projectPart)
     return defines;
 }
 
-BuiltinEditorDocumentParser::BuiltinEditorDocumentParser(const QString &filePath)
+BuiltinEditorDocumentParser::BuiltinEditorDocumentParser(const QString &filePath,
+                                                         int fileSizeLimitInMb)
     : BaseEditorDocumentParser(filePath)
+    , m_fileSizeLimitInMb(fileSizeLimitInMb)
 {
     qRegisterMetaType<CPlusPlus::Snapshot>("CPlusPlus::Snapshot");
 }
@@ -191,6 +193,7 @@ void BuiltinEditorDocumentParser::updateImpl(const QFutureInterface<void> &futur
             if (releaseSourceAndAST_)
                 doc->releaseSourceAndAST();
         });
+        sourceProcessor.setFileSizeLimitInMb(m_fileSizeLimitInMb);
         sourceProcessor.setCancelChecker([future]() {
            return future.isCanceled();
         });
diff --git a/src/plugins/cpptools/builtineditordocumentparser.h b/src/plugins/cpptools/builtineditordocumentparser.h
index 7793ebfbe41..3f53ae765ed 100644
--- a/src/plugins/cpptools/builtineditordocumentparser.h
+++ b/src/plugins/cpptools/builtineditordocumentparser.h
@@ -39,7 +39,7 @@ class CPPTOOLS_EXPORT BuiltinEditorDocumentParser : public BaseEditorDocumentPar
     Q_OBJECT
 
 public:
-    BuiltinEditorDocumentParser(const QString &filePath);
+    BuiltinEditorDocumentParser(const QString &filePath, int fileSizeLimitInMb = -1);
 
     bool releaseSourceAndAST() const;
     void setReleaseSourceAndAST(bool release);
@@ -79,6 +79,8 @@ private:
 
     bool m_releaseSourceAndAST = true;
     ExtraState m_extraState;
+
+    const int m_fileSizeLimitInMb = -1;
 };
 
 } // namespace CppTools
diff --git a/src/plugins/cpptools/builtineditordocumentprocessor.cpp b/src/plugins/cpptools/builtineditordocumentprocessor.cpp
index daf7ebf762f..42daa679638 100644
--- a/src/plugins/cpptools/builtineditordocumentprocessor.cpp
+++ b/src/plugins/cpptools/builtineditordocumentprocessor.cpp
@@ -163,7 +163,8 @@ BuiltinEditorDocumentProcessor::BuiltinEditorDocumentProcessor(
         TextEditor::TextDocument *document,
         bool enableSemanticHighlighter)
     : BaseEditorDocumentProcessor(document->document(), document->filePath().toString())
-    , m_parser(new BuiltinEditorDocumentParser(document->filePath().toString()))
+    , m_parser(new BuiltinEditorDocumentParser(document->filePath().toString(),
+                                               indexerFileSizeLimitInMb()))
     , m_codeWarningsUpdated(false)
     , m_semanticHighlighter(enableSemanticHighlighter
                             ? new CppTools::SemanticHighlighter(document)