diff --git a/lib/api/utilities/resource_link_parser.rb b/lib/api/utilities/resource_link_parser.rb
index 7cd4d8033c..9821511bcf 100644
--- a/lib/api/utilities/resource_link_parser.rb
+++ b/lib/api/utilities/resource_link_parser.rb
@@ -75,7 +75,7 @@ module API
         private
 
         def resource_matcher
-          @@matcher ||= Regexp.compile(RESOURCE_REGEX)
+          @matcher ||= Regexp.compile(RESOURCE_REGEX)
         end
 
         # returns whether expectation and actual are identical