diff --git a/app/models/repository.rb b/app/models/repository.rb
index 4e45a6723b8..bbf35f04bbc 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -238,7 +238,7 @@ class Repository
   end
 
   def last_commit_for_path(sha, path)
-    args = %W(git rev-list --max-count 1 #{sha} -- #{path})
+    args = %W(git rev-list --max-count=1 #{sha} -- #{path})
     sha = Gitlab::Popen.popen(args, path_to_repo).first.strip
     commit(sha)
   end