diff --git a/library/PCUIF_CodecPort.ttcn b/library/PCUIF_CodecPort.ttcn
index 91f9bf9..3d6ceac 100644
--- a/library/PCUIF_CodecPort.ttcn
+++ b/library/PCUIF_CodecPort.ttcn
@@ -94,6 +94,11 @@
 	return -23;
 }
 
+function f_pcuif_close(PCUIF_CODEC_PT pt, integer id)
+{
+	pt.send(UD_close:{id := id});
+}
+
 function f_pcuif_listen(PCUIF_CODEC_PT pt, charstring sock) return integer {
 	var UD_listen_result res;
 	var UD_connected udc;