diff --git a/Demo/pdist/RCSProxy.py b/Demo/pdist/RCSProxy.py
index ff3f0ce..6732308 100755
--- a/Demo/pdist/RCSProxy.py
+++ b/Demo/pdist/RCSProxy.py
@@ -185,7 +185,7 @@
     what = sys.argv[1]
     if hasattr(proxy, what):
         attr = getattr(proxy, what)
-        if callable(attr):
+        if hasattr(attr, '__call__'):
             print attr(*sys.argv[2:])
         else:
             print repr(attr)