diff --git a/after/syntax/css/css3-transitions.vim b/after/syntax/css/css3-transitions.vim
index 966cc97..255d0a6 100644
--- a/after/syntax/css/css3-transitions.vim
+++ b/after/syntax/css/css3-transitions.vim
@@ -1,4 +1,4 @@
-if hlexists('cssTransitionProp')
+if !hlexists('cssTransitionProp')
   syn match cssFontProp contained "\<transition\(-\(property\|duration\|timing-function\|delay\)\)\=\>"
   syn keyword cssFontAttr contained linear
   syn match cssFontAttr contained "\<ease\(-\(in\|out\|in-out\)\)\=\>"