1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/progmodes/asm-mode.el b/lisp/progmodes/asm-mode.el
index 71d599d4f60..59035a1afb0 100644
--- a/lisp/progmodes/asm-mode.el
+++ b/lisp/progmodes/asm-mode.el
@@ -67,6 +67,7 @@
   (setq asm-mode-map (make-sparse-keymap))
   ;; Note that the comment character isn't set up until asm-mode is called.
   (define-key asm-mode-map ":"          'asm-colon)
+  (define-key f90-mode-map "\C-c;"      'comment-region)
   (define-key asm-mode-map "\C-i"       'tab-to-tab-stop)
   (define-key asm-mode-map "\C-j"       'asm-newline)
   (define-key asm-mode-map "\C-m"       'asm-newline)