diff --git a/less/mixins.less b/less/mixins.less
index db60f1aea296a009522dcde5b39ee850fde56e86..55032d2d8cde8779d220fd85268f5c83ff0101ba 100644
--- a/less/mixins.less
+++ b/less/mixins.less
@@ -260,6 +260,12 @@
        -o-transition: @transition;
           transition: @transition;
 }
+.transition-delay(@transition-delay) {
+  -webkit-transition-delay: @transition-delay;
+     -moz-transition-delay: @transition-delay;
+       -o-transition-delay: @transition-delay;
+          transition-delay: @transition-delay;
+}
 
 // Transformations
 .rotate(@degrees) {