diff --git a/lib/accesslib.php b/lib/accesslib.php
index 6680b41a16b..a54f45d730e 100644
--- a/lib/accesslib.php
+++ b/lib/accesslib.php
@@ -5242,7 +5242,7 @@ abstract class context extends stdClass implements IteratorAggregate {
      * @param stdClass $record
      */
     protected function __construct(stdClass $record) {
-        $this->_id           = $record->id;
+        $this->_id           = (int)$record->id;
         $this->_contextlevel = (int)$record->contextlevel;
         $this->_instanceid   = $record->instanceid;
         $this->_path         = $record->path;