diff --git a/lib/urldata.h b/lib/urldata.h
index 31e70cfbe..07733a16e 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -303,6 +303,9 @@ struct UrlData {
   /*************** Session - specific items ************/
   char *proxy; /* if proxy, set it here, set CONF_PROXY to use this */
   char *proxyuserpwd;  /* Proxy <user:password>, if used */
+  long proxyport; /* If non-zero, use this port number by default. If the
+                     proxy string features a ":[port]" that one will override
+                     this. */
 
   /*************** Request - specific items ************/