diff -r d60678a567a9 -r 328739ea70c3 hgext/gpg.py
--- a/hgext/gpg.py	Tue Jun 23 22:38:21 2015 -0700
+++ b/hgext/gpg.py	Tue Jun 23 22:20:08 2015 -0700
@@ -283,7 +283,7 @@
         editor = cmdutil.getcommiteditor(editform='gpg.sign', **opts)
         repo.commit(message, opts['user'], opts['date'], match=msigs,
                     editor=editor)
-    except ValueError, inst:
+    except ValueError as inst:
         raise util.Abort(str(inst))
 
 def shortkey(ui, key):