diff --git a/hlr/HLR_Tests.ttcn b/hlr/HLR_Tests.ttcn
index 8a96d7f..50109a6 100644
--- a/hlr/HLR_Tests.ttcn
+++ b/hlr/HLR_Tests.ttcn
@@ -711,7 +711,9 @@
 private function f_TC_gsup_sai() runs on HLR_ConnHdlr {
 	var GSUP_PDU res;
 	res := f_perform_SAI(g_pars.sub.imsi);
-	f_ensure_amf_separation_bit(res, '0'B);
+	if (ispresent(g_pars.sub.aud3g)) {
+		f_ensure_amf_separation_bit(res, '0'B);
+	}
 	/* TODO: match if tuple[s] matches expectation */
 	setverdict(pass);
 }