diff --git a/docs/nmap.dtd b/docs/nmap.dtd
index e2d918adb..8626db71b 100644
--- a/docs/nmap.dtd
+++ b/docs/nmap.dtd
@@ -79,7 +79,7 @@
 			start		%attr_numeric;	#IMPLIED
 			startstr	CDATA	        #IMPLIED
 			version		CDATA		#REQUIRED
-			xmloutputversion (1.02)		#REQUIRED
+			xmloutputversion CDATA		#REQUIRED
 >
 
 <!-- this element is written in output.c:doscaninfo() -->