diff --git a/scripts/targets-asn.nse b/scripts/targets-asn.nse
index 643b2bb42..7970ab71e 100644
--- a/scripts/targets-asn.nse
+++ b/scripts/targets-asn.nse
@@ -84,10 +84,12 @@ action = function(host, port)
 						break
 					else
 						for i, prefix in ipairs(stdnse.strsplit("\n",data)) do
-							table.insert(prefixes,prefix)
-							if target.ALLOW_NEW_TARGETS then
-								stdnse.print_debug("Added targets: "..prefix)
-								local status,err = target.add(prefix)
+							if ( #prefix > 1 ) then
+								table.insert(prefixes,prefix)
+								if target.ALLOW_NEW_TARGETS then
+									stdnse.print_debug("Added targets: "..prefix)
+									local status,err = target.add(prefix)
+								end
 							end
 						end
 					end