diff --git a/apps/tasks/js/tasks.js b/apps/tasks/js/tasks.js
index 1db3f87e37..60d2a523be 100644
--- a/apps/tasks/js/tasks.js
+++ b/apps/tasks/js/tasks.js
@@ -455,7 +455,7 @@ $(document).ready(function(){
 
 	$('#tasks_addtask').click(function(){
 		var input = $('#tasks_newtask').val();
-		$.getJSON('ajax/addtask.php',{text:input},function(jsondata){
+		$.getJSON(OC.filePath('tasks', 'ajax', 'addtask.php'),{text:input},function(jsondata){
 			if(jsondata.status == 'success'){
 				$('#tasks_list').append(OC.Tasks.create_task_div(jsondata.task));
 			}