diff --git a/.stylelintignore b/.stylelintignore
index 12ddb3eb6a59d..be8cec8fbc48c 100644
--- a/.stylelintignore
+++ b/.stylelintignore
@@ -1,4 +1,5 @@
 # Generated by "grunt ignorefiles"
+**/yui/build/*
 theme/bootstrapbase/style/
 theme/clean/style/custom.css
 theme/more/style/custom.css
diff --git a/Gruntfile.js b/Gruntfile.js
index 78583d0dbca87..29d271c22f323 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -222,6 +222,7 @@ module.exports = function(grunt) {
       // Generate .stylelintignore.
       var stylelintIgnores = [
           '# Generated by "grunt ignorefiles"',
+          '**/yui/build/*',
           'theme/bootstrapbase/style/',
           'theme/clean/style/custom.css',
           'theme/more/style/custom.css',