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-rw-r--r--lisp/textmodes/css-mode.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/textmodes/css-mode.el b/lisp/textmodes/css-mode.el
index 5f4eebdf977..3e84b43bcb4 100644
--- a/lisp/textmodes/css-mode.el
+++ b/lisp/textmodes/css-mode.el
@@ -215,7 +215,7 @@
(defconst css-escapes-re
"\\\\\\(?:[^\000-\037\177]\\|[0-9a-fA-F]+[ \n\t\r\f]?\\)")
(defconst css-nmchar-re (concat "\\(?:[-[:alnum:]]\\|" css-escapes-re "\\)"))
-(defconst css-nmstart-re (concat "\\(?:[[:alpha:]]\\|" css-escapes-re "\\)"))
+(defconst css-nmstart-re (concat "\\(?:--\\)?\\(?:[[:alpha:]]\\|" css-escapes-re "\\)"))
(defconst css-ident-re ;; (concat css-nmstart-re css-nmchar-re "*")
;; Apparently, "at rules" names can start with a dash, e.g. @-moz-keyframes.
(concat css-nmchar-re "+"))