diff --git a/lib/irb/input-method.rb b/lib/irb/input-method.rb
index dc95065f97..f7a4535da7 100644
--- a/lib/irb/input-method.rb
+++ b/lib/irb/input-method.rb
@@ -318,6 +318,7 @@ module IRB
       dialog.trap_key = nil
       alt_d = [
         [Reline::Key.new(nil, 0xE4, true)], # Normal Alt+d.
+        [27, 100], # Normal Alt+d when convert-meta isn't used.
         [195, 164] # The "ä" that appears when Alt+d is pressed on xterm.
       ]