diff --git a/lib/javascript.php b/lib/javascript.php
index 63635666dd6..535a60963b4 100644
--- a/lib/javascript.php
+++ b/lib/javascript.php
@@ -64,10 +64,16 @@ minify($jsfiles);
 function minify($files) {
     global $CFG;
 
+    $cachedir = $CFG->dataroot.'/cache/js';
+    // make sure the cache dir exist
+    if (!file_exists($cachedir)) {
+        @mkdir($cachedir, $CFG->directorypermissions, true);
+    }
+
     if (0 === stripos(PHP_OS, 'win')) {
         Minify::setDocRoot(); // IIS may need help
     }
-    Minify::setCache($CFG->dataroot.'/temp', true);
+    Minify::setCache($cachedir, true);
 
     $options = array(
         // Maximum age to cache
diff --git a/lib/outputrequirementslib.php b/lib/outputrequirementslib.php
index 8ebdded2021..c1b268886f4 100644
--- a/lib/outputrequirementslib.php
+++ b/lib/outputrequirementslib.php
@@ -1004,6 +1004,6 @@ function js_reset_all_caches() {
     require_once("$CFG->libdir/filelib.php");
 
     set_config('jsrev', empty($CFG->jsrev) ? 1 : $CFG->jsrev+1);
-    //fulldelete("$CFG->dataroot/cache/js");
+    fulldelete("$CFG->dataroot/cache/js");
 }