diff --git a/app/xml_cdr/xml_cdr_inc.php b/app/xml_cdr/xml_cdr_inc.php
index 30ae4e08cf..ff0835b319 100644
--- a/app/xml_cdr/xml_cdr_inc.php
+++ b/app/xml_cdr/xml_cdr_inc.php
@@ -120,7 +120,7 @@
 		$mod_caller_id_name = str_replace("*", "%", $caller_id_name);
 		$sql_where_ands[] = "caller_id_name like '".$mod_caller_id_name."'";
 	}
-	if (strlen($caller_extension_uuid) > 0) {
+	if (strlen($caller_extension_uuid) > 0 && is_uuid($caller_extension_uuid)) {
 		$sql_where_ands[] = "extension_uuid = '".$caller_extension_uuid."'";
 	}
 	if (strlen($caller_id_number) > 0) {