diff --git a/src/plugins/qmldesigner/components/propertyeditor/simplecolorpalettesingleton.h b/src/plugins/qmldesigner/components/propertyeditor/simplecolorpalettesingleton.h
index 004feea5325..77ad2b0732a 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/simplecolorpalettesingleton.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/simplecolorpalettesingleton.h
@@ -30,11 +30,10 @@
 #include <QtQml/qqml.h>
 #include <QList>
 #include <QColor>
+#include <simplecolorpalette.h>
 
 namespace QmlDesigner {
 
-class PaletteColor;
-
 class SimpleColorPaletteSingleton : public QObject
 {
     Q_OBJECT
diff --git a/src/plugins/qmldesigner/qmlpreviewplugin/qmlpreviewplugin.pro b/src/plugins/qmldesigner/qmlpreviewplugin/qmlpreviewplugin.pro
index 56eadb58a58..ec8c9b1d636 100644
--- a/src/plugins/qmldesigner/qmlpreviewplugin/qmlpreviewplugin.pro
+++ b/src/plugins/qmldesigner/qmlpreviewplugin/qmlpreviewplugin.pro
@@ -9,7 +9,7 @@ include (../qmldesigner_dependencies.pri)
 
 LIBS += -L$$IDE_PLUGIN_PATH
 LIBS += -l$$qtLibraryName(QmlDesigner)
-LIBS += -l$$qtLibraryName(Extensionsystem)
+LIBS += -l$$qtLibraryName(ExtensionSystem)
 LIBS += -l$$qtLibraryName(Core)
 LIBS += -l$$qtLibraryName(ProjectExplorer)
 LIBS += -l$$qtLibraryName(Utils)