diff --git a/less/mixins.less b/less/mixins.less
index 20dd0d19ac..68fbb5829b 100644
--- a/less/mixins.less
+++ b/less/mixins.less
@@ -432,7 +432,7 @@
     background-color: mix(@midColor, @endColor, 80%);
     background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
     background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
-    background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
+    background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop*100%, @endColor);
     background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
     background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
     background-repeat: no-repeat;