diff --git a/gulpfile.js b/gulpfile.js
index b743fe1a33..5b5fec9e25 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -35,6 +35,7 @@ var sassOptions = {
     silenceDeprecations: [
         "color-functions",
         "global-builtin",
+        "if-function",
         "import",
         "legacy-js-api",
     ],