1 files changed, 1 insertions, 0 deletions
diff --git a/lib/pp.rb b/lib/pp.rb
index 7d1c502817..0e737d23f6 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -17,6 +17,7 @@ module Kernel
   # prints arguments in pretty form.
   #
   # pp returns argument(s).
+  undef pp if method_defined?(:pp)
   def pp(*objs)
     objs.each {|obj|
       PP.pp(obj)