diff --git a/src/gb/gprs_bssgp_util.c b/src/gb/gprs_bssgp_util.c
index 5245c5f..92896c1 100644
--- a/src/gb/gprs_bssgp_util.c
+++ b/src/gb/gprs_bssgp_util.c
@@ -190,6 +190,7 @@
 static const uint8_t rad_sts_ies[] = { BSSGP_IE_RADIO_CAUSE };
 static const uint8_t suspend_ies[] = { BSSGP_IE_TLLI, BSSGP_IE_ROUTEING_AREA };
 static const uint8_t suspend_ack_ies[] = { BSSGP_IE_TLLI, BSSGP_IE_ROUTEING_AREA, BSSGP_IE_SUSPEND_REF_NR };
+static const uint8_t suspend_nack_ies[] = { BSSGP_IE_TLLI, BSSGP_IE_ROUTEING_AREA };
 static const uint8_t resume_ies[] = { BSSGP_IE_TLLI, BSSGP_IE_ROUTEING_AREA, BSSGP_IE_SUSPEND_REF_NR };
 static const uint8_t resume_ack_ies[] = { BSSGP_IE_TLLI, BSSGP_IE_ROUTEING_AREA };
 static const uint8_t resume_nack_ies[] = { BSSGP_IE_TLLI, BSSGP_IE_ROUTEING_AREA };
@@ -273,6 +274,7 @@
 		[BSSGP_PDUT_RADIO_STATUS] = MSG_DEF("RADIO-STATUS", rad_sts_ies, UL|PTP),
 		[BSSGP_PDUT_SUSPEND] = MSG_DEF("SUSPEND", suspend_ies, UL|SIG),
 		[BSSGP_PDUT_SUSPEND_ACK] = MSG_DEF("SUSPEND-ACK", suspend_ack_ies, DL|SIG),
+		[BSSGP_PDUT_SUSPEND_NACK] = MSG_DEF("SUSPEND-NACK", suspend_nack_ies, DL|SIG),
 		[BSSGP_PDUT_RESUME] = MSG_DEF("RESUME", resume_ies, UL|SIG),
 		[BSSGP_PDUT_RESUME_ACK] = MSG_DEF("RESUME-ACK", resume_ack_ies, DL|SIG),
 		[BSSGP_PDUT_RESUME_NACK] = MSG_DEF("RESUME-NACK", resume_nack_ies, DL|SIG),