diff --git a/library/BSSMAP_Templates.ttcn b/library/BSSMAP_Templates.ttcn
index d92ea61..a3a50de 100644
--- a/library/BSSMAP_Templates.ttcn
+++ b/library/BSSMAP_Templates.ttcn
@@ -944,6 +944,18 @@
 	}
 }
 
+template PDU_BSSAP ts_BSSMAP_ClassmarkRequest
+modifies ts_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			classmarkRequest := {
+				messageType := '58'O,
+				talkerPriority := omit
+			}
+		}
+	}
+}
+
 /* return Layer3 octetstring inside BSSAP PDU */
 function f_bssap_extract_l3(PDU_BSSAP bssap) return template octetstring {
 	if (ischosen(bssap.pdu.bssmap)) {