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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 39885c10860..e74efdc7a13 100644
--- a/lisp/textmodes/css-mode.el
+++ b/lisp/textmodes/css-mode.el
@@ -896,7 +896,7 @@ cannot be completed sensibly: `custom-ident',
;; No face.
nil)))
;; Variables.
- (,(concat "--" css-ident-re) (0 font-lock-variable-name-face))
+ (,(concat (rx symbol-start) "--" css-ident-re) (0 font-lock-variable-name-face))
;; Properties. Again, we don't limit ourselves to css-property-ids.
(,(concat "\\(?:[{;]\\|^\\)[ \t]*\\("
"\\(?:\\(" css-proprietary-nmstart-re "\\)\\|"