diff --git a/lib/irb/cmd/help.rb b/lib/irb/cmd/help.rb
index 10ec13475a..0629479e92 100644
--- a/lib/irb/cmd/help.rb
+++ b/lib/irb/cmd/help.rb
@@ -36,6 +36,7 @@ module IRB
           end
           nil
         end
+        nil
       ensure
         execute(*names)
       end