diff --git a/synchro/synchro_exec.php b/synchro/synchro_exec.php
index e9a1327f1..f48c3fd19 100644
--- a/synchro/synchro_exec.php
+++ b/synchro/synchro_exec.php
@@ -117,7 +117,7 @@ foreach(explode(',', $sDataSourcesList) as $iSDS)
 	$oSynchroDataSource = MetaModel::GetObject('SynchroDataSource', $iSDS, false);
 	if ($oSynchroDataSource == null)
 	{
-		$oP->p("The data source (id=$iSDS) does not exist. Exiting...");
+		$oP->p("ERROR: The data source (id=$iSDS) does not exist. Exiting...");
 		$oP->output();
 		exit -3;
 	}