diff --git a/mrblib/kernel.rb b/mrblib/kernel.rb
index fd4dc04ac..81d7acf5d 100644
--- a/mrblib/kernel.rb
+++ b/mrblib/kernel.rb
@@ -45,7 +45,7 @@ module Kernel
     while(true)
       yield
     end
-  rescue => StopIteration
+  rescue StopIteration
     nil
   end