diff --git a/src/tests/hnb-test.c b/src/tests/hnb-test.c
index 1f0685a..087e93f 100644
--- a/src/tests/hnb-test.c
+++ b/src/tests/hnb-test.c
@@ -542,7 +542,7 @@
 static struct msgb *gen_initue_lu(int is_ps, uint32_t conn_id, const char *imsi)
 {
 	uint8_t lu[] = { 0x05, 0x08, 0x70, 0x62, 0xf2, 0x30, 0xff, 0xf3, 0x57,
-		/*	 len-  IMSI------------------------------------------ */
+		/*	 len, IMSI/type, IMSI-------------------------------- */
 			 0x08, 0x29, 0x26, 0x24, 0x10, 0x32, 0x54, 0x76, 0x98,
 			 0x33, 0x03, 0x57, 0x18 , 0xb2 };
 	uint8_t plmn_id[] = { 0x09, 0x01, 0x99 };