diff --git a/lisp/help.el b/lisp/help.el
index 49394fea2cd..8b29a10e0cf 100644
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -793,7 +793,6 @@ or a buffer name."
 
 	(when describe-bindings-outline
           (setq-local outline-regexp ".*:$")
-          (setq-local outline-heading-end-regexp ":\n")
           (setq-local outline-level (lambda () 1))
           (setq-local outline-minor-mode-cycle t
                       outline-minor-mode-highlight t
diff --git a/lisp/outline.el b/lisp/outline.el
index 61e9b0f3289..9d453881b7e 100644
--- a/lisp/outline.el
+++ b/lisp/outline.el
@@ -259,14 +259,19 @@ non-nil and point is located on the heading line.")
     map))
 
 (defvar outline-font-lock-keywords
-  '(
+  `(
     ;; Highlight headings according to the level.
     (eval . (list (or (when outline-search-function
-                        (lambda (limit)
-                          (when-let* ((ret (funcall outline-search-function limit)))
-                            ;; This is equivalent to adding ".*" in the regexp below.
-                            (set-match-data (list (match-beginning 0) (pos-eol)))
-                            ret)))
+                        ,(lambda (limit)
+                           (when-let* ((ret (funcall outline-search-function limit)))
+                             ;; This is equivalent to adding ".*" in the regexp below.
+                             (set-match-data
+                              (list (match-beginning 0)
+                                    (save-excursion
+                                      (save-match-data
+                                        (re-search-forward
+                                         (concat ".*" outline-heading-end-regexp) nil t)))))
+                             ret)))
                       (concat "^\\(?:" outline-regexp "\\).*" outline-heading-end-regexp))
                   0 '(if outline-minor-mode
                          (if outline-minor-mode-highlight
@@ -520,11 +525,16 @@ outline font-lock faces to those of major mode."
   (save-excursion
     (goto-char (point-min))
     (let ((regexp (unless outline-search-function
-                    (concat "^\\(?:" outline-regexp "\\).*$"))))
+                    (concat "^\\(?:" outline-regexp "\\).*" outline-heading-end-regexp))))
       (while (if outline-search-function
                  (when-let* ((ret (funcall outline-search-function)))
                    ;; This is equivalent to adding ".*" in the regexp above.
-                   (set-match-data (list (match-beginning 0) (pos-eol)))
+                   (set-match-data
+                    (list (match-beginning 0)
+                          (save-excursion
+                            (save-match-data
+                              (re-search-forward
+                               (concat ".*" outline-heading-end-regexp) nil t)))))
                    ret)
                (re-search-forward regexp nil t))
         (let ((overlay (make-overlay (match-beginning 0) (match-end 0))))