--- old/jdk/src/java.desktop/windows/native/libawt/windows/awt_Window.cpp	2015-12-16 14:33:48.301356090 +0100
+++ new/jdk/src/java.desktop/windows/native/libawt/windows/awt_Window.cpp	2015-12-16 14:33:48.137356087 +0100
@@ -3667,8 +3667,8 @@
     rfs->component = selfGlobalRef;
     rfs->isMouseEventCause = isMouseEventCause;
 
-    return (jboolean)AwtToolkit::GetInstance().SyncCall(
-        (void*(*)(void*))AwtWindow::_RequestWindowFocus, rfs);
+    return (jboolean)(AwtToolkit::GetInstance().SyncCall(
+        (void*(*)(void*))AwtWindow::_RequestWindowFocus, rfs) != NULL);
     // global refs and rfs are deleted in _RequestWindowFocus
 
     CATCH_BAD_ALLOC_RET(JNI_FALSE);