diff --git a/include/osmocom/gsm/protocol/ipaccess.h b/include/osmocom/gsm/protocol/ipaccess.h
index 0f5d54f..80413d1 100644
--- a/include/osmocom/gsm/protocol/ipaccess.h
+++ b/include/osmocom/gsm/protocol/ipaccess.h
@@ -38,6 +38,7 @@
 	IPAC_PROTO_EXT_ORC	= 0x04,		/* OML Router Control */
 	IPAC_PROTO_EXT_GSUP	= 0x05,		/* GSUP GPRS extension */
 	IPAC_PROTO_EXT_OAP	= 0x06,		/* Osmocom Authn Protocol */
+	IPAC_PROTO_EXT_RSPRO	= 0x07,		/* Remote SIM protocol */
 };
 
 enum ipaccess_msgtype {