diff --git a/extensions/libxt_tcp.c b/extensions/libxt_tcp.c
index 56bdba5..bb66747 100644
--- a/extensions/libxt_tcp.c
+++ b/extensions/libxt_tcp.c
@@ -44,13 +44,13 @@
 
 	buffer = strdup(portstring);
 	if ((cp = strchr(buffer, ':')) == NULL)
-		ports[0] = ports[1] = parse_port(buffer, "tcp");
+		ports[0] = ports[1] = xtables_parse_port(buffer, "tcp");
 	else {
 		*cp = '\0';
 		cp++;
 
-		ports[0] = buffer[0] ? parse_port(buffer, "tcp") : 0;
-		ports[1] = cp[0] ? parse_port(cp, "tcp") : 0xFFFF;
+		ports[0] = buffer[0] ? xtables_parse_port(buffer, "tcp") : 0;
+		ports[1] = cp[0] ? xtables_parse_port(cp, "tcp") : 0xFFFF;
 
 		if (ports[0] > ports[1])
 			exit_error(PARAMETER_PROBLEM,