diff --git a/sc2/doc/users/manual.txt b/sc2/doc/users/manual.txt
index 8bf1baf8e..4545d63d6 100644
--- a/sc2/doc/users/manual.txt
+++ b/sc2/doc/users/manual.txt
@@ -61,6 +61,10 @@ image brighter, lower than 1.0 makes it darker.
 
 Print fps information in the status window.
 
+	-C               (or --configdir)
+
+Set the directory where the game will store the config data.
+
 	-n               (or --contentdir)
 
 Set the directory where the game will seek its data.