diff --git a/TODO-RELEASE b/TODO-RELEASE
index 7699aff..33e27af 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -8,5 +8,6 @@
 # If any interfaces have been removed or changed since the last public release: c:r:0.
 #library	what			description / commit summary line
 libosmogsm	new API			gsm0808_create_sapi_reject_cause() with cause argument
+libosmogsm	ABI change		struct osmo_gprs_cell_options size changed (new field at the end)
 libosmovty	ABI change		struct cmd_element: add a field for program specific attributes
 libosmovty	ABI change		struct vty_app_info: optional program specific attributes description
diff --git a/include/osmocom/gprs/protocol/gsm_04_60.h b/include/osmocom/gprs/protocol/gsm_04_60.h
index 05728f4..ed63fe0 100644
--- a/include/osmocom/gprs/protocol/gsm_04_60.h
+++ b/include/osmocom/gprs/protocol/gsm_04_60.h
@@ -167,7 +167,7 @@
 	GPRS_NMO_III	= 2,	/* no paging coordination */
 };
 
-/* TS 04.60 12.24 */
+/* TS 44.060 12.24 */
 struct osmo_gprs_cell_options {
 	enum osmo_gprs_nmo nmo;
 	/* T3168: wait for packet uplink assignment message */
@@ -187,6 +187,7 @@
 		uint8_t pfc_supported;
 		uint8_t dtm_supported;
 		uint8_t bss_paging_coordination;
+		bool ccn_active;
 	} ext_info;
 };
 
diff --git a/src/gsm/gsm48_rest_octets.c b/src/gsm/gsm48_rest_octets.c
index 1f9c2b5..3a424f7 100644
--- a/src/gsm/gsm48_rest_octets.c
+++ b/src/gsm/gsm48_rest_octets.c
@@ -906,6 +906,8 @@
 		bitvec_set_bit(bv, 0);
 	} else {
 		/* extension information */
+
+		/* R99 extension: */
 		bitvec_set_bit(bv, 1);
 		if (!gco->ext_info.egprs_supported) {
 			/* 6bit length of extension */
@@ -927,6 +929,10 @@
 		bitvec_set_bit(bv, gco->ext_info.pfc_supported);
 		bitvec_set_bit(bv, gco->ext_info.dtm_supported);
 		bitvec_set_bit(bv, gco->ext_info.bss_paging_coordination);
+
+		/* REL-4 extension: */
+		bitvec_set_bit(bv, gco->ext_info.ccn_active);
+		bitvec_set_bit(bv, 0); /* NW_EXT_UTBF disabled */
 	}
 
 	return 0;