diff --git a/library/LAPDm_Types.ttcn b/library/LAPDm_Types.ttcn
index 577c9bd..caccc12 100644
--- a/library/LAPDm_Types.ttcn
+++ b/library/LAPDm_Types.ttcn
@@ -352,23 +352,24 @@
 
 	template LapdmFrame tr_LAPDm_I(template LapdmSapi sapi, template boolean c_r,
 					template boolean p, template uint3_t nr,
-					template uint3_t ns, template octetstring l3) := {
+					template uint3_t ns, template octetstring l3,
+					boolean m := false) := {
 		ab := {
 			addr := tr_LapdmAddr(sapi, c_r),
 			ctrl := tr_LapdmCtrlI(nr, ns, p),
 			len := ?,
-			m := false,
+			m := m,
 			el := 1,
 			payload := l3
 		}
 	}
 	template (value) LapdmFrame ts_LAPDm_I(LapdmSapi sapi, boolean c_r, boolean p, uint3_t nr,
-						uint3_t ns, octetstring l3) := {
+						uint3_t ns, octetstring l3, boolean m := false) := {
 		ab := {
 			addr := ts_LapdmAddr(sapi, c_r),
 			ctrl := ts_LapdmCtrlI(nr, ns, p),
 			len := 0,
-			m := false,
+			m := m,
 			el := 1,
 			payload := l3
 		}