diff --git a/todo/nmap.txt b/todo/nmap.txt
index 3c5a26535..974ebd8c6 100644
--- a/todo/nmap.txt
+++ b/todo/nmap.txt
@@ -1,5 +1,9 @@
 TODO $Id: TODO 11866 2009-01-24 23:10:05Z fyodor $ -*-text-*-
 
+o Make CONCURRENCY_LIMIT in nse_main.lua at least the min-parallelism.
+  Otherwise NSE is limited to 1000 socket-using threads even if you've
+  requested more.
+
 o Add IPv6 subnet/pattern support like we offer for IPv4.
   o Obviously we can't go scanning a /48 in IPv6, but small subnets do
     make sense in some cases.  For example, the VPS hosting company