diff --git a/README.md b/README.md
index 895829e6..3dec4117 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,8 @@ ranges and port ranges.
 NOTE: masscan uses a **custom TCP/IP stack**. Anything other than simple port
 scans will cause conflict with the local TCP/IP stack. This means you need to
 either use the `-S` option to use a separate IP address, or configure your
-operating system to firewall the ports that masscan uses.
+operating system to firewall the ports that masscan uses. Because 
+masscan uses a custom stack, it cannot scan the local host.
 
 This tool is free, but consider funding it here:
 1MASSCANaHUiyTtR3bJ2sLGuMw5kDBaj4T