diff --git a/ShortCSS.styl b/ShortCSS.styl
index 32a648c..3221eb7 100644
--- a/ShortCSS.styl
+++ b/ShortCSS.styl
@@ -219,6 +219,12 @@ transit()
   -moz-transition arguments
   -o-transition arguments
   transition arguments
+  
+transit-delay()
+  -webkit-transition-delay arguments
+  -moz-transition-delay arguments
+  -o-transition-delay arguments
+  transition-delay arguments
 
 transfrm()
   -webkit-transform arguments