diff --git a/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h b/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h
index 0ab37151b07fd8c1e05390e5ede2d60860a4b7b7..a8eefd08bbf04cdb6d7ff00f77cfe65e10e2e656 100644
--- a/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h
+++ b/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h
@@ -56,8 +56,8 @@ class CORESHARED_EXPORT ItemLibraryEntry
 {
     //friend class QmlDesigner::MetaInfo;
     //friend class QmlDesigner::Internal::MetaInfoParser;
-    friend CORESHARED_EXPORT QDataStream& QmlDesigner::operator<<(QDataStream& stream, const ItemLibraryEntry &itemLibraryEntry);
-    friend CORESHARED_EXPORT QDataStream& QmlDesigner::operator>>(QDataStream& stream, ItemLibraryEntry &itemLibraryEntry);
+    friend CORESHARED_EXPORT QDataStream& operator<<(QDataStream& stream, const ItemLibraryEntry &itemLibraryEntry);
+    friend CORESHARED_EXPORT QDataStream& operator>>(QDataStream& stream, ItemLibraryEntry &itemLibraryEntry);
 
 public:
     ItemLibraryEntry();
diff --git a/src/plugins/qmldesigner/designercore/include/modelnode.h b/src/plugins/qmldesigner/designercore/include/modelnode.h
index 635922f12b5a7c54fbb52e09bf626a836c2147cd..c848395b046c6553a6e907251f1c43da4e70b7a8 100644
--- a/src/plugins/qmldesigner/designercore/include/modelnode.h
+++ b/src/plugins/qmldesigner/designercore/include/modelnode.h
@@ -77,7 +77,7 @@ class CORESHARED_EXPORT  ModelNode
     friend CORESHARED_EXPORT uint qHash(const ModelNode & node);
     friend CORESHARED_EXPORT QDebug operator<<(QDebug debug, const ModelNode &modelNode);
     friend CORESHARED_EXPORT bool operator <(const ModelNode &firstNode, const ModelNode &secondNode);
-    friend CORESHARED_EXPORT QList<Internal::InternalNodePointer> QmlDesigner::toInternalNodeList(const QList<ModelNode> &nodeList);
+    friend CORESHARED_EXPORT QList<Internal::InternalNodePointer> toInternalNodeList(const QList<ModelNode> &nodeList);
     friend class QmlDesigner::Model;
     friend class QmlDesigner::AbstractView;
     friend class QmlDesigner::NodeListProperty;
diff --git a/src/plugins/qmldesigner/designercore/include/propertycontainer.h b/src/plugins/qmldesigner/designercore/include/propertycontainer.h
index ae8d465251b661174abdcba41c1ab6a7e86dc1cc..3ebb65799c8e6ed6e05a1f65ae12f80e5791312c 100644
--- a/src/plugins/qmldesigner/designercore/include/propertycontainer.h
+++ b/src/plugins/qmldesigner/designercore/include/propertycontainer.h
@@ -49,8 +49,8 @@ CORESHARED_EXPORT QDataStream &operator>>(QDataStream &stream, PropertyContainer
 
 class CORESHARED_EXPORT PropertyContainer
 {
-    friend CORESHARED_EXPORT QDataStream &QmlDesigner::operator<<(QDataStream &stream, const PropertyContainer &propertyContainer);
-    friend CORESHARED_EXPORT QDataStream &QmlDesigner::operator>>(QDataStream &stream, PropertyContainer &propertyContainer);
+    friend CORESHARED_EXPORT QDataStream &operator<<(QDataStream &stream, const PropertyContainer &propertyContainer);
+    friend CORESHARED_EXPORT QDataStream &operator>>(QDataStream &stream, PropertyContainer &propertyContainer);
 
 public:
     PropertyContainer();