diff --git a/gulpfile.js b/gulpfile.js
index ecda5a81..1751fbe4 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -32,6 +32,7 @@ let flatten             = require('flat');
 let padEnd              = require('lodash.padend');
 let merge               = require('lodash.merge');
 let minimist            = require('minimist');
+let slash               = require('slash');
 let fileExtension       = require('file-extension');
 let log                 = require('fancy-log');
 let colors              = require('ansi-colors');
@@ -643,7 +644,7 @@ gulp.task('task:concatJS', () => {
 gulp.task('task:diffJS', () => {
     return gulp.src(PATH.JS.SRC, {base: 'js', since: gulp.lastRun('task:diffJS')})
         .pipe(filter(file => {
-            return combinedJsFiles.indexOf(file.path) < 0;
+            return combinedJsFiles.indexOf(slash(file.path)) < 0;
         }))
         .pipe(debug({title: 'Copy JS src: ', showFiles: false}))
         .pipe(bytediff.start())
diff --git a/package-lock.json b/package-lock.json
index 2477e232..81731102 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7857,6 +7857,12 @@
       "integrity": "sha512-rqYhcAnZ6d/vTPGghdrw7iumdcbXpsk1b8IG/rz+VWV51DM0p7XCtMoJ3qhPLIbp3tvyt3pKRbaaEMZYpHto8Q==",
       "dev": true
     },
+    "slash": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+      "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+      "dev": true
+    },
     "snapdragon": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/snapdragon/-/snapdragon-0.8.2.tgz",
diff --git a/package.json b/package.json
index 47c76966..08c5db15 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,7 @@
     "pretty-bytes": "^5.3.0",
     "promised-del": "1.0.x",
     "sass": "^1.41.1",
+    "slash": "3.0.0",
     "terminal-table": "0.0.x",
     "uglify-es": "^3.0.x"
   },