diff --git a/subsys/bluetooth/host/hci_core.c b/subsys/bluetooth/host/hci_core.c
index 1c2fc8dccf0..028cc715b51 100644
--- a/subsys/bluetooth/host/hci_core.c
+++ b/subsys/bluetooth/host/hci_core.c
@@ -4047,7 +4047,8 @@ void bt_data_parse(struct net_buf_simple *ad,
 		}
 
 		if (len > ad->len) {
-			LOG_WRN("malformed advertising data");
+			LOG_WRN("malformed advertising data %u / %u",
+				len, ad->len);
 			return;
 		}