diff --git a/lisp/progmodes/gud.el b/lisp/progmodes/gud.el
index ff04c05edff..a34b0bb2d48 100644
--- a/lisp/progmodes/gud.el
+++ b/lisp/progmodes/gud.el
@@ -477,7 +477,7 @@ off the specialized speedbar mode."
     ;; gud-marker-acc until we receive the rest of it.	Since we
     ;; know the full marker regexp above failed, it's pretty simple to
     ;; test for marker starts.
-    (if (string-match "\032.*\\'" gud-marker-acc)
+    (if (string-match "\n\\(\032.*\\)?\\'" gud-marker-acc)
 	(progn
 	  ;; Everything before the potential marker start can be output.
 	  (setq output (concat output (substring gud-marker-acc