diff --git a/webservices/cron.php b/webservices/cron.php
index 06a6bf290..f8603950f 100644
--- a/webservices/cron.php
+++ b/webservices/cron.php
@@ -88,6 +88,7 @@ function RunTask($oProcess, BackgroundTask $oTask, $oStartDate, $iTimeLimit)
 {
 	$oNow = new DateTime();
 	$fStart = microtime(true);
+	$oCtx = new ContextTag('CRON:Task:'.$oTask->Get('class_name'));
 
 	$sMessage = "";
 	$oExceptionToThrow = null;
@@ -145,6 +146,8 @@ function RunTask($oProcess, BackgroundTask $oTask, $oStartDate, $iTimeLimit)
 		throw $oExceptionToThrow;
 	}
 
+	unset($oCtx);
+
 	return $sMessage;
 }