diff --git a/lib/less/functions.js b/lib/less/functions.js
index 804b9e6f..5348c9a2 100644
--- a/lib/less/functions.js
+++ b/lib/less/functions.js
@@ -86,6 +86,13 @@ tree.functions = {
         hsl.a = clamp(hsl.a);
         return hsla(hsl);
     },
+    fade: function (color, amount) {
+        var hsl = color.toHSL();
+
+        hsl.a = amount.value / 100;
+        hsl.a = clamp(hsl.a);
+        return hsla(hsl);
+    },
     spin: function (color, amount) {
         var hsl = color.toHSL();
         var hue = (hsl.h + amount.value) % 360;