diff --git a/app/models/repository.rb b/app/models/repository.rb
index 8ad339970..290664600 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -231,8 +231,9 @@ class Repository < ActiveRecord::Base
   # Finds and returns a revision with a number or the beginning of a hash
   def find_changeset_by_name(name)
     return nil if name.blank?
-    changesets.find(:first, :conditions => (name.match(/^\d*$/) ?
-          ["revision = ?", name.to_s] : ["revision LIKE ?", name + '%']))
+    s = name.to_s
+    changesets.find(:first, :conditions => (s.match(/^\d*$/) ?
+          ["revision = ?", s] : ["revision LIKE ?", s + '%']))
   end
 
   def latest_changeset