diff --git a/lisp/simple.el b/lisp/simple.el
index bd19969341..97f6d4837e 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -125,7 +125,7 @@ next-error-message-highlight
   :version "28.1")
 
 (defface next-error-message
-  '((t (:inherit highlight)))
+  '((t (:inherit highlight :extend t)))
   "Face used to highlight the current error message in the `next-error' buffer."
   :group 'next-error
   :version "28.1")
@@ -484,7 +484,7 @@ next-error-message-highlight
     (with-current-buffer error-buffer
       (when next-error--message-highlight-overlay
         (delete-overlay next-error--message-highlight-overlay))
-      (let ((ol (make-overlay (line-beginning-position) (line-end-position))))
+      (let ((ol (make-overlay (line-beginning-position) (1+ (line-end-position)))))
         ;; do not override region highlighting
         (overlay-put ol 'priority -50)
         (overlay-put ol 'face 'next-error-message)