diff --git a/Usage.md b/Usage.md
index d41ff9f..6b143ef 100644
--- a/Usage.md
+++ b/Usage.md
@@ -447,7 +447,7 @@ Example of valid syntax:
     $ python sqlmap.py -u "http://192.168.136.131/sqlmap/mysql/basic/get_int.php?id=1" \
     --auth-type Basic --auth-cred "testuser:testpass"
 
-### HTTP protocol certificate authentication
+### HTTP protocol private key authentication
 
 Option: `--auth-private`