diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index d3e021d..a614122 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -2093,6 +2093,8 @@
 	return f_concat_pad(12, '49123'H, suffix);
 }
 
+external function enc_MobileIdentityLV(in MobileIdentityLV si) return octetstring
+	with { extension "prototype(convert) encode(RAW)" };
 
 
 }