modules/graphics/src/main/java/com/sun/javafx/stage/WindowPeerListener.java

@@ -52,10 +52,15 @@
     @Override
     public void changedSize(float width, float height) {
         WindowHelper.notifySizeChanged(window, width, height);
     }
 
+    @Override
+    public void changedScale(float xScale, float yScale) {
+        WindowHelper.notifyScaleChanged(window, xScale, yScale);
+    }
+
     public void changedFocused(boolean focused, FocusCause cause) {
         // Also overridden in subclasses
         window.setFocused(focused);
     }