diff --git a/src/plugins/coreplugin/fancyactionbar.h b/src/plugins/coreplugin/fancyactionbar.h
index 4f48473571e..c6f413561a3 100644
--- a/src/plugins/coreplugin/fancyactionbar.h
+++ b/src/plugins/coreplugin/fancyactionbar.h
@@ -38,7 +38,7 @@ class FancyToolButton : public QToolButton
 {
     Q_OBJECT
 
-    Q_PROPERTY(qreal fader READ fader WRITE setFader CONSTANT)
+    Q_PROPERTY(qreal fader READ fader WRITE setFader)
 
 public:
     FancyToolButton(QAction *action, QWidget *parent = nullptr);
diff --git a/src/plugins/coreplugin/fancytabwidget.h b/src/plugins/coreplugin/fancytabwidget.h
index 050dea1083e..7ad4b3f4d0d 100644
--- a/src/plugins/coreplugin/fancytabwidget.h
+++ b/src/plugins/coreplugin/fancytabwidget.h
@@ -44,7 +44,7 @@ class FancyTab : public QObject
 {
     Q_OBJECT
 
-    Q_PROPERTY(qreal fader READ fader WRITE setFader CONSTANT)
+    Q_PROPERTY(qreal fader READ fader WRITE setFader)
 
 public:
     FancyTab(QWidget *tabbar)