diff --git a/src/Gui/Quarter/EventFilter.cpp b/src/Gui/Quarter/EventFilter.cpp
index f0bb794c2..060882e2a 100644
--- a/src/Gui/Quarter/EventFilter.cpp
+++ b/src/Gui/Quarter/EventFilter.cpp
@@ -85,9 +85,6 @@ public:
       device->setMousePosition(mousepos);
     }
   }
-
-private:
-  qreal device_pixel_ratio = 1.0;
 };
 
 #define PRIVATE(obj) obj->pimpl
diff --git a/src/Gui/propertyeditor/PropertyItem.cpp b/src/Gui/propertyeditor/PropertyItem.cpp
index aa627ac51..516fdf973 100644
--- a/src/Gui/propertyeditor/PropertyItem.cpp
+++ b/src/Gui/propertyeditor/PropertyItem.cpp
@@ -3511,6 +3511,19 @@ PropertyItemEditorFactory::~PropertyItemEditorFactory()
 {
 }
 
+#if (QT_VERSION >= 0x050300)
+QWidget * PropertyItemEditorFactory::createEditor (int /*type*/, QWidget * /*parent*/) const
+{
+    // do not allow to create any editor widgets because we do that in subclasses of PropertyItem
+    return 0;
+}
+
+QByteArray PropertyItemEditorFactory::valuePropertyName (int /*type*/) const
+{
+    // do not allow to set properties because we do that in subclasses of PropertyItem
+    return "";
+}
+#else
 QWidget * PropertyItemEditorFactory::createEditor (QVariant::Type /*type*/, QWidget * /*parent*/) const
 {
     // do not allow to create any editor widgets because we do that in subclasses of PropertyItem
@@ -3522,6 +3535,7 @@ QByteArray PropertyItemEditorFactory::valuePropertyName (QVariant::Type /*type*/
     // do not allow to set properties because we do that in subclasses of PropertyItem
     return "";
 }
+#endif
 
 #include "moc_PropertyItem.cpp"
 
diff --git a/src/Gui/propertyeditor/PropertyItem.h b/src/Gui/propertyeditor/PropertyItem.h
index b55f717f3..7967591fb 100644
--- a/src/Gui/propertyeditor/PropertyItem.h
+++ b/src/Gui/propertyeditor/PropertyItem.h
@@ -945,8 +945,13 @@ public:
     PropertyItemEditorFactory();
     virtual ~PropertyItemEditorFactory();
 
-    virtual QWidget * createEditor ( QVariant::Type type, QWidget * parent ) const;
-    virtual QByteArray valuePropertyName ( QVariant::Type type ) const;
+#if (QT_VERSION >= 0x050300)
+    virtual QWidget *createEditor(int userType, QWidget *parent) const;
+    virtual QByteArray valuePropertyName(int userType) const;
+#else
+    virtual QWidget * createEditor(QVariant::Type type, QWidget * parent) const;
+    virtual QByteArray valuePropertyName (QVariant::Type type) const;
+#endif
 };
 
 } // namespace PropertyEditor