diff --git a/ext/json/lib/json/common.rb b/ext/json/lib/json/common.rb
index af130dc006..0498a28b9b 100644
--- a/ext/json/lib/json/common.rb
+++ b/ext/json/lib/json/common.rb
@@ -71,8 +71,6 @@ module JSON
       self.state = generator::State
       const_set :State, self.state
       const_set :SAFE_STATE_PROTOTYPE, State.new # for JRuby
-      const_set :FAST_STATE_PROTOTYPE, create_fast_state
-      const_set :PRETTY_STATE_PROTOTYPE, create_pretty_state
     ensure
       $VERBOSE = old
     end