diff --git a/ffi/lib/llhttp/parser.rb b/ffi/lib/llhttp/parser.rb
index 840976b..9b78aaa 100644
--- a/ffi/lib/llhttp/parser.rb
+++ b/ffi/lib/llhttp/parser.rb
@@ -152,7 +152,7 @@ def finish
     end
 
     def self.free(pointer)
-      proc { LLHttp.llhttp_free(pointer) }
+      proc { LLHttp.rb_llhttp_free(pointer) }
     end
   end
 end