diff --git a/lib/liquid/tag.rb b/lib/liquid/tag.rb
index ce4404e..73d289c 100644
--- a/lib/liquid/tag.rb
+++ b/lib/liquid/tag.rb
@@ -39,7 +39,7 @@ module Liquid
     end
 
     def disabled?(context, output)
-      if context.registers['disabled_tags']&.disabled?(tag_name)
+      if context.registers['disabled_tags'].disabled?(tag_name)
         output << disabled_error_message
       end
     end