diff --git a/osmopy/osmo_ipa.py b/osmopy/osmo_ipa.py
index a1fcaf6..246101d 100755
--- a/osmopy/osmo_ipa.py
+++ b/osmopy/osmo_ipa.py
@@ -34,7 +34,7 @@
     # OpenBSC extensions: OSMO, MGCP_OLD
     PROTO = dict(RSL=0x00, CCM=0xFE, SCCP=0xFD, OML=0xFF, OSMO=0xEE, MGCP_OLD=0xFC)
     # ...OML Router Control, GSUP GPRS extension, Osmocom Authn Protocol
-    EXT = dict(CTRL=0, MGCP=1, LAC=2, SMSC=3, ORC=4, GSUP=5, OAP=6)
+    EXT = dict(CTRL=0, MGCP=1, LAC=2, SMSC=3, ORC=4, GSUP=5, OAP=6, RSPRO=7)
     # OpenBSC extension: SCCP_OLD
     MSGT = dict(PING=0x00, PONG=0x01, ID_GET=0x04, ID_RESP=0x05, ID_ACK=0x06, SCCP_OLD=0xFF)
     _IDTAG = dict(SERNR=0, UNITNAME=1, LOCATION=2, TYPE=3, EQUIPVERS=4, SWVERSION=5, IPADDR=6, MACADDR=7, UNIT=8)