diff --git a/app/models/project.rb b/app/models/project.rb
index 5c1d7946..b7445db0 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -260,7 +260,7 @@ class Project < ActiveRecord::Base
 
   def commit(commit_id = nil)
     commit = if commit_id
-               repo.commits(commit_id).first
+               repo.commit(commit_id)
              else
                repo.commits.first
              end