diff --git a/include/net.h b/include/net.h
index f9984ae..de2d7bb 100644
--- a/include/net.h
+++ b/include/net.h
@@ -839,6 +839,9 @@
 /* copy a filename (allow for "..." notation, limit length) */
 void copy_filename(char *dst, const char *src, int size);
 
+/* check if serverip is specified in filename from the command line */
+int is_serverip_in_cmd(void);
+
 /* get a random source port */
 unsigned int random_port(void);