diff --git a/wxPython/src/gtk/_misc.py b/wxPython/src/gtk/_misc.py
index c99efbcb53..ec2128941b 100644
--- a/wxPython/src/gtk/_misc.py
+++ b/wxPython/src/gtk/_misc.py
@@ -1114,7 +1114,7 @@ class Timer(_core.EvtHandler):
         """GetId(self) -> int"""
         return _misc_.Timer_GetId(*args, **kwargs)
 
-    def Destroy():
+    def Destroy(self):
         """NO-OP: Timers must be destroyed by normal refrence counting"""
         pass
 
diff --git a/wxPython/src/msw/_misc.py b/wxPython/src/msw/_misc.py
index 7a13e1e378..8e67e39ace 100644
--- a/wxPython/src/msw/_misc.py
+++ b/wxPython/src/msw/_misc.py
@@ -1114,7 +1114,7 @@ class Timer(_core.EvtHandler):
         """GetId(self) -> int"""
         return _misc_.Timer_GetId(*args, **kwargs)
 
-    def Destroy():
+    def Destroy(self):
         """NO-OP: Timers must be destroyed by normal refrence counting"""
         pass