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

*** 52,61 ****
--- 52,66 ----
      @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);
      }