diff --git a/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c b/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c
index be81ee1c1..aaa24a17c 100644
--- a/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c
+++ b/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c
@@ -53,7 +53,8 @@ pb_tnc_msg_info_t pb_tnc_msg_infos[] = {
 };
 
 pb_tnc_msg_info_t pb_tnc_tcg_msg_infos[] = {
-	{ 20, FALSE, TRUE, FALSE },
+	{ 0 }, /* dummy entry because pb_tnc_tcg_msg_type_t starts with 1 */
+	{ 20, FALSE, TRUE,  FALSE },
 };
 
 /**