New class syntax.
diff --git a/Lib/lib-stdwin/WindowParent.py b/Lib/lib-stdwin/WindowParent.py
index 7b965f9..a0593c5 100644
--- a/Lib/lib-stdwin/WindowParent.py
+++ b/Lib/lib-stdwin/WindowParent.py
@@ -12,7 +12,7 @@
 
 Error = 'WindowParent.Error'	# Exception
 
-class WindowParent() = ManageOneChild():
+class WindowParent(ManageOneChild):
 	#
 	def create(self, (title, size)):
 		self.title = title