diff --git a/lisp/speedbar.el b/lisp/speedbar.el
index 9c5f028e4ab..991c8a33d46 100644
--- a/lisp/speedbar.el
+++ b/lisp/speedbar.el
@@ -899,12 +899,9 @@ This basically creates a sparse keymap, and makes its parent be
   "Additional menu items while in file-mode.")
 
 (defvar speedbar-easymenu-definition-trailer
-  (append
-   (if (and (featurep 'custom) (fboundp 'custom-declare-variable))
-       (list ["Customize..." speedbar-customize t]))
-   (list
+  '(["Customize..." speedbar-customize t]
     ["Close" dframe-close-frame t]
-    ["Quit" delete-frame t] ))
+    ["Quit" delete-frame t])
   "Menu items appearing at the end of the speedbar menu.")
 
 (defvar speedbar-desired-buffer nil