--- a/hgext/obsolete.py	Thu Aug 23 18:01:28 2012 +0200
+++ b/hgext/obsolete.py	Thu Aug 23 18:19:42 2012 +0200
@@ -44,7 +44,8 @@
 
 try:
     from mercurial import obsolete
-    obsolete._enabled = True
+    if not obsolete._enabled:
+        obsolete._enabled = True
 except ImportError:
     raise util.Abort('Obsolete extension requires Mercurial 2.3 (or later)')