diff --git a/lib/reline.rb b/lib/reline.rb
index f33532812a..1109d7a58e 100644
--- a/lib/reline.rb
+++ b/lib/reline.rb
@@ -483,6 +483,7 @@ module Reline
   def_single_delegators :core, :last_incremental_search
   def_single_delegators :core, :last_incremental_search=
   def_single_delegators :core, :add_dialog_proc
+  def_single_delegators :core, :autocompletion, :autocompletion=
 
   def_single_delegators :core, :readmultiline
   def_instance_delegators self, :readmultiline