--- old/modules/javafx.graphics/src/main/native-glass/mac/GlassWindow.m	2016-10-24 12:15:35.000000000 -0700
+++ new/modules/javafx.graphics/src/main/native-glass/mac/GlassWindow.m	2016-10-24 12:15:35.000000000 -0700
@@ -636,6 +636,12 @@
         if ((*env)->ExceptionCheck(env)) return;
     }
 
+    if (jWindowNotifyScaleChanged == NULL)
+    {
+        jWindowNotifyScaleChanged = (*env)->GetMethodID(env, jWindowClass, "notifyScaleChanged", "(FFFF)V");
+        if ((*env)->ExceptionCheck(env)) return;
+    }
+
     if (jWindowNotifyClose == NULL)
     {
         jWindowNotifyClose = (*env)->GetMethodID(env, jWindowClass, "notifyClose", "()V");