diff --git a/docs/nmap.dtd b/docs/nmap.dtd
index 603e00e95..ba091be2e 100644
--- a/docs/nmap.dtd
+++ b/docs/nmap.dtd
@@ -151,7 +151,7 @@
 >
 
 <!-- these elements are written by scan_engine.c:ultrascan_host_pspec_update() -->
-<!ELEMENT hosthint (status,address,hostnames)* >
+<!ELEMENT hosthint (status,address+,hostnames?) >
 
 <!-- these elements are written by output.c:write_xml_initial_hostinfo() -->
 <!ELEMENT status	EMPTY >