1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/simple.el b/lisp/simple.el
index 4b00ad6f8fc..b55487968e6 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -2425,6 +2425,7 @@ it were the arg to `interactive' (which see) to interactively read the value."
 (or completion-list-mode-map
     (let ((map (make-sparse-keymap)))
       (define-key map [mouse-2] 'mouse-choose-completion)
+      (define-key map [down-mouse-2] nil)
       (define-key map "\C-m" 'choose-completion)
       (define-key map [return] 'choose-completion)
       (setq completion-list-mode-map map)))