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-rw-r--r--lisp/progmodes/grep.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/progmodes/grep.el b/lisp/progmodes/grep.el
index 9387a087e47..7d01777d441 100644
--- a/lisp/progmodes/grep.el
+++ b/lisp/progmodes/grep.el
@@ -329,7 +329,7 @@ Notice that using \\[next-error] or \\[compile-goto-error] modifies
`complation-last-buffer' rather than `grep-last-buffer'.")
;;;###autoload
-(defvar grep-regexp-alist
+(defconst grep-regexp-alist
'(("^\\(.+?\\)\\(:[ \t]*\\)\\([0-9]+\\)\\2"
1 3)
;; Rule to match column numbers is commented out since no known grep