diff --git a/bacnet-stack/src/cov.c b/bacnet-stack/src/cov.c
index 773d0718..c759a9b9 100644
--- a/bacnet-stack/src/cov.c
+++ b/bacnet-stack/src/cov.c
@@ -280,6 +280,7 @@ int cov_notify_decode_service_request(
             }
             /* end of list? */
             if (decode_is_closing_tag_number(&apdu[len], 4)) {
+                value->next = NULL;
                 break;
             }
             /* is there another one to decode? */