diff --git a/files/gitlab-cookbooks/gitlab/libraries/helper.rb b/files/gitlab-cookbooks/gitlab/libraries/helper.rb
index 90a595c..a2eefe1 100644
--- a/files/gitlab-cookbooks/gitlab/libraries/helper.rb
+++ b/files/gitlab-cookbooks/gitlab/libraries/helper.rb
@@ -87,7 +87,7 @@ end
 module SingleQuoteHelper
 
   def single_quote(string)
-   "'#{string}'" if not string.nil?
+   "'#{string}'" unless string.nil?
   end
 
 end
--
libgit2 0.21.2