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-rw-r--r--lisp/progmodes/autoconf.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/progmodes/autoconf.el b/lisp/progmodes/autoconf.el
index 2949b2da92f..97cf21d175e 100644
--- a/lisp/progmodes/autoconf.el
+++ b/lisp/progmodes/autoconf.el
@@ -52,7 +52,7 @@
"AC_\\(SUBST\\|DEFINE\\(_UNQUOTED\\)?\\)(\\(\\sw+\\)")
(defvar autoconf-font-lock-keywords
- `(("A[CHMS]_\\sw+" . font-lock-keyword-face)
+ `(("\\_<A[CHMS]_\\sw+" . font-lock-keyword-face)
(,autoconf-definition-regexp
3 font-lock-function-name-face)
;; Are any other M4 keywords really appropriate for configure.in,