diff --git a/library/BSSMAP_Emulation.ttcn b/library/BSSMAP_Emulation.ttcn
index 67d9e98..5f8fe4f 100644
--- a/library/BSSMAP_Emulation.ttcn
+++ b/library/BSSMAP_Emulation.ttcn
@@ -70,6 +70,7 @@
 /* similar to PDU_BSSAP with DTAP, but DTAP is already decoded! */
 type record PDU_DTAP_MO {
 	OCT1			dlci optional,
+	boolean			skip_seq_patching optional,
 	PDU_ML3_MS_NW		dtap
 }
 
@@ -84,8 +85,9 @@
 	dtap := dtap
 }
 
-template PDU_DTAP_MO ts_PDU_DTAP_MO(template PDU_ML3_MS_NW dtap, template OCT1 dlci := '00'O) := {
+template PDU_DTAP_MO ts_PDU_DTAP_MO(template PDU_ML3_MS_NW dtap, template OCT1 dlci := '00'O, boolean skip_seq_patching := false) := {
 	dlci := dlci,
+	skip_seq_patching := skip_seq_patching,
 	dtap := dtap
 }
 
@@ -649,7 +651,9 @@
 			/* convert from decoded DTAP to encoded DTAP */
 			var octetstring l3_enc := enc_PDU_ML3_MS_NW(dtap_mo.dtap);
 			/* patch correct L3 send sequence number N(SD) into l3_enc */
-			f_ML3_patch_seq(ConnectionTable[idx], dtap_mo.dtap, l3_enc);
+			if (dtap_mo.skip_seq_patching == false) {
+				f_ML3_patch_seq(ConnectionTable[idx], dtap_mo.dtap, l3_enc);
+			}
 			bssap := valueof(ts_BSSAP_DTAP(l3_enc, dtap_mo.dlci));
 			BSSAP.send(ts_BSSAP_DATA_req(ConnectionTable[idx].sccp_conn_id, bssap));
 			}