diff --git a/lib/galaxy/eggs/scramble.py b/lib/galaxy/eggs/scramble.py
index 4725695d0af..a22ccdc9621 100644
--- a/lib/galaxy/eggs/scramble.py
+++ b/lib/galaxy/eggs/scramble.py
@@ -153,7 +153,7 @@ class ScrambleEgg( Egg ):
             try:
                 t.extract( member )
             except:
-                log.exception("Could not extract %s" % member)
+                log.exception( "Could not extract %s", member )
                 raise
         t.close()
         os.rename( tld, self.name )