diff --git a/lib.php b/lib.php
index f2ff7236e310587d443a34d5a474a1836d34aa75..5e6a05a6436fc180965376a9a5fdde29a485d1d2 100644
--- a/lib.php
+++ b/lib.php
@@ -26,7 +26,11 @@ require_once('locallib.php');
 $adobeconnect_EXAMPLE_CONSTANT = 42;
 
 /** Include eventslib.php */
-require_once($CFG->libdir.'/eventslib.php');
+$branch = (int)$CFG->branch;
+if ($branch <= 35) {
+    require_once($CFG->libdir.'/eventslib.php');
+}
+
 /** Include calendar/lib.php */
 require_once($CFG->dirroot.'/calendar/lib.php');