diff --git a/Mac/Tools/IDE/Wapplication.py b/Mac/Tools/IDE/Wapplication.py
index fdcd9fbcc8b..ec0071f22bb 100644
--- a/Mac/Tools/IDE/Wapplication.py
+++ b/Mac/Tools/IDE/Wapplication.py
@@ -202,7 +202,10 @@ class Application(FrameWork.Application):
 				import sys
 				sys.stderr.write("XXX killed unknown (crashed?) Python window.\n")
 			else:
-				MacOS.HandleEvent(event)
+				if hasattr(MacOS, 'HandleEvent'):
+					MacOS.HandleEvent(event)
+				else:
+					print 'Unexpected updateEvent:', event
 	
 	def suspendresume(self, onoff):
 		pass
diff --git a/Mac/Tools/IDE/Wwindows.py b/Mac/Tools/IDE/Wwindows.py
index 653499bf3a9..ffab76c5806 100644
--- a/Mac/Tools/IDE/Wwindows.py
+++ b/Mac/Tools/IDE/Wwindows.py
@@ -519,7 +519,10 @@ class ModalDialog(Dialog):
 			name = "do_%d" % partcode
 		
 		if name == "do_inDesk":
-			MacOS.HandleEvent(event)
+			if hasattr(MacOS, "HandleEvent"):
+				MacOS.HandleEvent(event)
+			else:
+				print 'Unexpected inDesk event:', event
 			return
 		if wid == self.wid:
 			try: