diff --git a/src/libs/utils/mimetypes/mimedatabase.cpp b/src/libs/utils/mimetypes/mimedatabase.cpp
index 91f28dfc0b1..f10fe8a1be1 100644
--- a/src/libs/utils/mimetypes/mimedatabase.cpp
+++ b/src/libs/utils/mimetypes/mimedatabase.cpp
@@ -303,6 +303,14 @@ MimeDatabase::~MimeDatabase()
     d = 0;
 }
 
+void MimeDatabase::addMimeTypes(const QString &fileName)
+{
+    auto d = MimeDatabasePrivate::instance();
+    QMutexLocker locker(&d->mutex);
+    auto xmlProvider = static_cast<MimeXMLProvider *>(d->provider());
+    xmlProvider->addFile(fileName);
+}
+
 /*!
     \fn MimeType MimeDatabase::mimeTypeForName(const QString &nameOrAlias) const;
     Returns a MIME type for \a nameOrAlias or an invalid one if none found.
diff --git a/src/libs/utils/mimetypes/mimedatabase.h b/src/libs/utils/mimetypes/mimedatabase.h
index e5d3c89f6af..71d43041e18 100644
--- a/src/libs/utils/mimetypes/mimedatabase.h
+++ b/src/libs/utils/mimetypes/mimedatabase.h
@@ -82,6 +82,9 @@ public:
 
     QList<MimeType> allMimeTypes() const;
 
+    // Qt Creator additions
+    static void addMimeTypes(const QString &fileName);
+
 private:
     Internal::MimeDatabasePrivate *d;
 };
diff --git a/src/libs/utils/mimetypes/mimeprovider.cpp b/src/libs/utils/mimetypes/mimeprovider.cpp
index cc28c456aea..324fb36a954 100644
--- a/src/libs/utils/mimetypes/mimeprovider.cpp
+++ b/src/libs/utils/mimetypes/mimeprovider.cpp
@@ -762,6 +762,8 @@ void MimeXMLProvider::ensureLoaded()
             allFiles.prepend(QLatin1String(":/qt-project.org/qmime/freedesktop.org.xml"));
         }
 
+        allFiles.append(m_additionalFiles);
+
         if (m_allFiles == allFiles)
             return;
         m_allFiles = allFiles;
@@ -859,3 +861,12 @@ void MimeXMLProvider::addMagicMatcher(const MimeMagicRuleMatcher &matcher)
 {
     m_magicMatchers.append(matcher);
 }
+
+void MimeXMLProvider::addFile(const QString &filePath)
+{
+    m_additionalFiles.append(filePath);
+    if (m_loaded) {
+        m_allFiles.append(filePath);
+        load(filePath);
+    } // else: will be loaded in ensureLoaded()
+}
diff --git a/src/libs/utils/mimetypes/mimeprovider_p.h b/src/libs/utils/mimetypes/mimeprovider_p.h
index fbbafe71b13..c6c996b47f7 100644
--- a/src/libs/utils/mimetypes/mimeprovider_p.h
+++ b/src/libs/utils/mimetypes/mimeprovider_p.h
@@ -148,6 +148,9 @@ public:
     void addAlias(const QString &alias, const QString &name);
     void addMagicMatcher(const MimeMagicRuleMatcher &matcher);
 
+    // Qt Creator additions
+    void addFile(const QString &filePath);
+
 private:
     void ensureLoaded();
     void load(const QString &fileName);
@@ -166,6 +169,9 @@ private:
 
     QList<MimeMagicRuleMatcher> m_magicMatchers;
     QStringList m_allFiles;
+
+    // Qt Creator additions
+    QStringList m_additionalFiles;
 };
 
 } // Internal