diff --git a/phpBB/assets/javascript/core.js b/phpBB/assets/javascript/core.js
index 296c5b0ef9..d08e6c223e 100644
--- a/phpBB/assets/javascript/core.js
+++ b/phpBB/assets/javascript/core.js
@@ -47,6 +47,18 @@ phpbb.clearLoadingTimeout = function() {
 	}
 };
 
+
+/**
+* Close popup alert after a specified delay
+*
+* @param int Delay in ms until darkenwrapper's click event is triggered
+*/
+phpbb.closeDarkenWrapper = function(delay) {
+	phpbbAlertTimer = setTimeout(function() {
+		$('#darkenwrapper').trigger('click');
+	}, delay);
+};
+
 /**
  * Display a simple alert similar to JSs native alert().
  *
diff --git a/phpBB/styles/prosilver/template/ajax.js b/phpBB/styles/prosilver/template/ajax.js
index e9f8064b9e..0a8366290a 100644
--- a/phpBB/styles/prosilver/template/ajax.js
+++ b/phpBB/styles/prosilver/template/ajax.js
@@ -2,17 +2,6 @@
 
 "use strict";
 
-/**
-* Close popup alert after a specified delay
-*
-* @param int Delay in ms until darkenwrapper's click event is triggered
-*/
-phpbb.closeDarkenWrapper = function(delay) {
-	phpbbAlertTimer = setTimeout(function() {
-		$('#darkenwrapper').trigger('click');
-	}, delay);
-};
-
 // This callback will mark all forum icons read
 phpbb.addAjaxCallback('mark_forums_read', function(res) {
 	var readTitle = res.NO_UNREAD_POSTS;