Index: django/conf/urls/defaults.py
===================================================================
--- django/conf/urls/defaults.py	(revision 5045)
+++ django/conf/urls/defaults.py	(working copy)
@@ -21,5 +21,7 @@
         # For include(...) processing.
         return RegexURLResolver(regex, view[0], kwargs)
     else:
-        return RegexURLPattern(regex, prefix and (prefix + '.' + view) or view, kwargs, name)
+        if prefix and isinstance(view, basestring):
+            view = prefix + '.' + view
+        return RegexURLPattern(regex, view, kwargs, name)