diff --git a/login/token.php b/login/token.php
index 919b97c610d8c..19a9eaecc8f6c 100644
--- a/login/token.php
+++ b/login/token.php
@@ -160,6 +160,8 @@
             $token->creatorid = $user->id;
             $token->timecreated = time();
             $token->externalserviceid = $service_record->id;
+            // MDL-43119 Token valid for 3 months (12 weeks).
+            $token->validuntil = $token->timecreated + 12 * WEEKSECS;
             $token->id = $DB->insert_record('external_tokens', $token);
 
             $params = array(