diff --git a/doc/sefun/query_mud_port b/doc/sefun/query_mud_port
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@@ -0,0 +1,23 @@
+DEPRECATED
+SYNOPSIS
+        int query_mud_port(void)
+        int query_mud_port(object user)
+        int query_mud_port(int num)
+
+DESCRIPTION
+        Returns the port number the parser uses for user connections.
+
+        If no argument is given, the port for this_player() is
+        returned. If this_player() is not existing or not interactive,
+        the first port number open for connections is returned.
+
+        If an user object is given, the port used for its connection
+        is returned.
+        If a positive number is given, the <num>th port number the
+        parser uses for connections is returned (given that there are
+        that many ports).
+        If -1 is given, the number of ports open for connections is
+        returned.
+
+SEE ALSO
+        query_udp_port(E)