diff --git a/src/Gui/CallTips.cpp b/src/Gui/CallTips.cpp
index f39d564106..f022637eb8 100644
--- a/src/Gui/CallTips.cpp
+++ b/src/Gui/CallTips.cpp
@@ -472,7 +472,7 @@ void CallTipsList::showTips(const QString& line)
     static QPixmap property_icon = BitmapFactory().pixmap("ClassBrowser/property.svg");
 
     // object is in error state
-    static QPixmap forbidden_icon(Gui::BitmapFactory().pixmapFromSvg("forbidden", QSize(8, 8)));
+    static QPixmap forbidden_icon(Gui::BitmapFactory().pixmapFromSvg("forbidden", property_icon.size() / 4));
     static QPixmap forbidden_type_module_icon = BitmapFactory().merge(type_module_icon,forbidden_icon,BitmapFactoryInst::BottomLeft);
     static QPixmap forbidden_type_class_icon = BitmapFactory().merge(type_class_icon,forbidden_icon,BitmapFactoryInst::BottomLeft);
     static QPixmap forbidden_method_icon = BitmapFactory().merge(method_icon,forbidden_icon,BitmapFactoryInst::BottomLeft);