diff --git a/functions/app.php b/functions/app.php
index 9a6626df8..c285e976b 100644
--- a/functions/app.php
+++ b/functions/app.php
@@ -416,7 +416,7 @@ function addToMailQueue($data) {
 }
 
 function createiCalStr($datetime, $title, $description, $location) {
-    require_once "libs/zapcal/zapcallib.php";
+    require_once "../libs/zapcal/zapcallib.php";
 
     // Create the iCal object
     $cal_event = new ZCiCal();
@@ -443,7 +443,7 @@ function createiCalStr($datetime, $title, $description, $location) {
 }
 
 function createiCalStrCancel($originaliCalStr) {
-    require_once "libs/zapcal/zapcallib.php";
+    require_once "../libs/zapcal/zapcallib.php";
 
     // Import the original iCal string
     $cal_event = new ZCiCal($originaliCalStr);