diff --git a/tasks/phpcs.js b/tasks/phpcs.js
index 5a5d079..193a474 100644
--- a/tasks/phpcs.js
+++ b/tasks/phpcs.js
@@ -41,7 +41,7 @@ module.exports = function(grunt) {
             target = this.target,
             options = this.options(defaults),
             execute = path.normalize(options.bin),
-            files = [].concat.apply([], this.files.map(function(mapping) { return mapping.src; })).sort();
+            files = this.filesSrc.sort();
         
         // removes duplicate files
         files = files.filter(function(file, position) { 
@@ -70,4 +70,4 @@ module.exports = function(grunt) {
             done(error);
         });
     });
-};
\ No newline at end of file
+};