diff --git a/lib/redmine/scm/adapters/git_adapter.rb b/lib/redmine/scm/adapters/git_adapter.rb
index 6d012a7e..88acc2ed 100644
--- a/lib/redmine/scm/adapters/git_adapter.rb
+++ b/lib/redmine/scm/adapters/git_adapter.rb
@@ -102,7 +102,7 @@ module Redmine
 
         def default_branch
           bras = self.branches
-          return if bras.nil?
+          return nil if bras.nil?
           bras.include?('master') ? 'master' : bras.first
         end