diff --git a/yasnippet.el b/yasnippet.el
index f1bba52..0102a64 100644
--- a/yasnippet.el
+++ b/yasnippet.el
@@ -823,8 +823,8 @@ Honour `yas-dont-activate', which see."
             ("${\\([0-9]+\\):?"
              (0 font-lock-keyword-face)
              (1 font-lock-warning-face t))
-            ("${" font-lock-keyword-face)
-            ("$[0-9]+?" font-lock-preprocessor-face)
+            ("${" . font-lock-keyword-face)
+            ("$[0-9]+?" . font-lock-preprocessor-face)
             ("\\(\\$(\\)" 1 font-lock-preprocessor-face)
             ("}"
              (0 font-lock-keyword-face)))))