replace callable()
diff --git a/Lib/lib-tk/Tix.py b/Lib/lib-tk/Tix.py
index 2616252..f1a1091 100755
--- a/Lib/lib-tk/Tix.py
+++ b/Lib/lib-tk/Tix.py
@@ -405,7 +405,7 @@
         elif kw: cnf = kw
         options = ()
         for k, v in cnf.items():
-            if callable(v):
+            if hasattr(v, '__call__'):
                 v = self._register(v)
             options = options + ('-'+k, v)
         return master.tk.call(('image', 'create', imgtype,) + options)