diff --git a/lisp/progmodes/compile.el b/lisp/progmodes/compile.el
index 36c3e79b80d..96036ff322a 100644
--- a/lisp/progmodes/compile.el
+++ b/lisp/progmodes/compile.el
@@ -251,7 +251,7 @@ of[ \t]+\"?\\([a-zA-Z]?:?[^\":\n]+\\)\"?:" 3 2 nil (1))
      "^\\(?:[[:alpha:]][-[:alnum:].]+: ?\\)?\
 \\([0-9]*[^0-9\n]\\(?:[^\n ]\\| [^-/\n]\\)*?\\): ?\
 \\([0-9]+\\)\\(?:\\([.:]\\)\\([0-9]+\\)\\)?\
-\\(?:-\\([0-9]+\\)?\\(?:\\3\\([0-9]+\\)\\)?\\)?:\
+\\(?:-\\([0-9]+\\)?\\(?:\\.?\\([0-9]+\\)\\)?\\)?:\
 \\(?: *\\(\\(?:Future\\|Runtime\\)?[Ww]arning\\|W:\\)\\|\
  *\\([Ii]nfo\\(?:\\>\\|rmationa?l?\\)\\|I:\\|instantiated from\\|[Nn]ote\\)\\|\
 \[0-9]?\\(?:[^0-9\n]\\|$\\)\\|[0-9][0-9][0-9]\\)"