diff --git a/docs/nmap.usage.txt b/docs/nmap.usage.txt
index 75eba3ffb..d8b379263 100644
--- a/docs/nmap.usage.txt
+++ b/docs/nmap.usage.txt
@@ -30,6 +30,7 @@ SCAN TECHNIQUES:
 PORT SPECIFICATION AND SCAN ORDER:
   -p <port ranges>: Only scan specified ports
     Ex: -p22; -p1-65535; -p U:53,111,137,T:21-25,80,139,8080,S:9
+  --exclude-ports <port ranges>: Exclude the specified ports from scanning
   -F: Fast mode - Scan fewer ports than the default scan
   -r: Scan ports consecutively - don't randomize
   --top-ports <number>: Scan <number> most common ports