diff --git a/mrbgems/mruby-proc-ext/mrblib/proc.rb b/mrbgems/mruby-proc-ext/mrblib/proc.rb
index b71663938..789b7a3ac 100644
--- a/mrbgems/mruby-proc-ext/mrblib/proc.rb
+++ b/mrbgems/mruby-proc-ext/mrblib/proc.rb
@@ -27,7 +27,7 @@ class Proc
 
     pproc = self
     make_curry = proc do |given_args=[]|
-      send(type) do |*args|
+      __send__(type) do |*args|
         new_args = given_args + args
         if new_args.size >= arity
           pproc[*new_args]