diff --git a/include/osmocom/gsm/protocol/gsm_04_08.h b/include/osmocom/gsm/protocol/gsm_04_08.h
index 0c2fcf2..074c258 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08.h
@@ -1272,6 +1272,7 @@
 
 /* Additional MM elements */
 #define GSM48_IE_LOCATION_AREA	0x13
+#define GSM48_IE_AUTN		0x20
 #define GSM48_IE_PRIORITY_LEV	0x80
 #define GSM48_IE_FOLLOW_ON_PROC	0xa1
 #define GSM48_IE_CTS_PERMISSION	0xa2
diff --git a/include/osmocom/gsm/protocol/gsm_04_08_gprs.h b/include/osmocom/gsm/protocol/gsm_04_08_gprs.h
index f35d11b..e0e887f 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08_gprs.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08_gprs.h
@@ -22,6 +22,7 @@
 #define GSM48_MT_GMM_AUTH_CIPH_REQ	0x12
 #define GSM48_MT_GMM_AUTH_CIPH_RESP	0x13
 #define GSM48_MT_GMM_AUTH_CIPH_REJ	0x14
+#define GSM48_MT_GMM_AUTH_CIPH_FAIL	0x1C
 #define GSM48_MT_GMM_ID_REQ		0x15
 #define GSM48_MT_GMM_ID_RESP		0x16
 #define GSM48_MT_GMM_STATUS		0x20
@@ -79,6 +80,9 @@
 	GSM48_IE_GMM_IMEISV		= 0x23,	/* 10.5.1.4 */
 	GSM48_IE_GMM_CAUSE		= 0x25,	/* 10.5.5.14 */
 	GSM48_IE_GMM_DRX_PARAM		= 0x27,	/* 10.5.5.6 */
+	GSM48_IE_GMM_AUTN		= 0x28,	/* 10.5.3.1.1 */
+	GSM48_IE_GMM_AUTH_RES_EXT	= 0x29, /* 10.5.3.2.1 */
+	GSM48_IE_GMM_AUTH_FAIL_PAR	= 0x30,	/* 10.5.3.2.2 */
 	GSM48_IE_GMM_MS_NET_CAPA	= 0x31,	/* 10.5.5.12 */
 	GSM48_IE_GMM_PDP_CTX_STATUS	= 0x32,	/* 10.5.7.1 */
 	GSM48_IE_GMM_PS_LCS_CAPA	= 0x33,	/* 10.5.5.22 */
@@ -160,6 +164,7 @@
 enum gsm48_gmm_cause {
 	GMM_CAUSE_IMSI_UNKNOWN		= 0x02,
 	GMM_CAUSE_ILLEGAL_MS		= 0x03,
+	GMM_CAUSE_IMEI_NOT_ACCEPTED	= 0x05,
 	GMM_CAUSE_ILLEGAL_ME		= 0x06,
 	GMM_CAUSE_GPRS_NOTALLOWED	= 0x07,
 	GMM_CAUSE_GPRS_OTHER_NOTALLOWED	= 0x08,
@@ -169,9 +174,16 @@
 	GMM_CAUSE_LA_NOTALLOWED		= 0x0c,
 	GMM_CAUSE_ROAMING_NOTALLOWED	= 0x0d,
 	GMM_CAUSE_NO_GPRS_PLMN		= 0x0e,
+	GMM_CAUSE_NO_SUIT_CELL_IN_LA	= 0x0f,
 	GMM_CAUSE_MSC_TEMP_NOTREACH	= 0x10,
 	GMM_CAUSE_NET_FAIL		= 0x11,
+	GMM_CAUSE_MAC_FAIL		= 0x14,
+	GMM_CAUSE_SYNC_FAIL		= 0x15,
 	GMM_CAUSE_CONGESTION		= 0x16,
+	GMM_CAUSE_GSM_AUTH_UNACCEPT	= 0x17,
+	GMM_CAUSE_NOT_AUTH_FOR_CSG	= 0x19,
+	GMM_CAUSE_SMS_VIA_GPRS_IN_RA	= 0x1c,
+	GMM_CAUSE_NO_PDP_ACTIVATED	= 0x28,
 	GMM_CAUSE_SEM_INCORR_MSG	= 0x5f,
 	GMM_CAUSE_INV_MAND_INFO		= 0x60,
 	GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL	= 0x61,