diff --git a/library/MGCP_Templates.ttcn b/library/MGCP_Templates.ttcn
index 79d9670..917ef89 100644
--- a/library/MGCP_Templates.ttcn
+++ b/library/MGCP_Templates.ttcn
@@ -55,6 +55,12 @@
 		val := f_mgcp_osmux_cid_encode(osmux_cid)
 	};
 
+	/* Osmocom extension: X-Osmux: {*,%u} */
+	template MgcpParameter t_MgcpParOsmoIGN(template charstring val) := {
+		code := "X-OSMO-IGN",
+		val := val
+	};
+
 	/* osmo-bsc_mgcp implements L/C/M/X only, osmo-mgw adds 'I' */
 	/* SDP: osmo-bsc_mgcp implements Tx of v,o,s,c,t,m,a */