diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index 2fb86d03a..0556c9723 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -2148,7 +2148,8 @@ template (value) PDU_L3_MS_SGSN
 			  RoutingAreaIdentificationV old_ra,
 			  boolean follow_on_pending := false,
 			  template (omit) MobileStationClassmark2_TLV cm2_tlv,
-			  template (omit) MobileStationClassmark3_TLV cm3_tlv
+			  template (omit) MobileStationClassmark3_TLV cm3_tlv,
+			  template (omit) OCT4 p_tmsi := omit
 		) := {
 	discriminator := '0000'B, /* overwritten */
 	tiOrSkip := {
@@ -2166,7 +2167,7 @@ template (value) PDU_L3_MS_SGSN
 				readyTimerValue := omit,
 				drxParameter := omit,
 				tmsiStatus := omit,
-				ptmsi := omit,
+				ptmsi := ts_MI_TMSI_TLV(p_tmsi),
 				mSNetworkCapability := omit,
 				pdpContextStatus := omit, /* TODO */
 				pC_LCSCapability := omit,