diff --git a/helm-buffers.el b/helm-buffers.el
index 294850865..a5e3deba3 100644
--- a/helm-buffers.el
+++ b/helm-buffers.el
@@ -203,7 +203,7 @@ Note that this variable is buffer-local.")
     (define-key map (kbd "M-a")       'helm-mark-all)
     (define-key map (kbd "C-]")       'helm-toggle-buffers-details)
     (define-key map (kbd "C-c a")     'helm-buffers-toggle-show-hidden-buffers)
-    (define-key map (kbd "<C-M-SPC>") 'helm-buffers-mark-similar-buffers)
+    (define-key map (kbd "C-M-SPC")   'helm-buffers-mark-similar-buffers)
     map)
   "Keymap for buffer sources in helm.")
 
diff --git a/helm-files.el b/helm-files.el
index 3379ab8f6..48cf8083a 100644
--- a/helm-files.el
+++ b/helm-files.el
@@ -540,7 +540,7 @@ NOTE that `helm-list-dir-external' needs ls and awk as dependencies."
   (let ((map (make-sparse-keymap)))
     (set-keymap-parent map helm-map)
     (define-key map (kbd "<C-return>")    'helm-cr-empty-string)
-    (define-key map (kbd "<M-RET>")       'helm-cr-empty-string)
+    (define-key map (kbd "M-RET")         'helm-cr-empty-string)
     (define-key map (kbd "C-]")           'helm-ff-run-toggle-basename)
     (define-key map (kbd "C-.")           'helm-find-files-up-one-level)
     (define-key map (kbd "C-l")           'helm-find-files-up-one-level)
diff --git a/helm-mode.el b/helm-mode.el
index 963b0d48c..a5d612aac 100644
--- a/helm-mode.el
+++ b/helm-mode.el
@@ -213,7 +213,7 @@ know what you are doing."
   (let ((map (make-sparse-keymap)))
     (set-keymap-parent map helm-map)
     (define-key map (kbd "<C-return>") 'helm-cr-empty-string)
-    (define-key map (kbd "<M-RET>") 'helm-cr-empty-string)
+    (define-key map (kbd "M-RET")      'helm-cr-empty-string)
     map)
   "Keymap for `helm-comp-read'.")