diff --git a/doc/pamusb.conf b/doc/pamusb.conf
index d562820..3a00875 100644
--- a/doc/pamusb.conf
+++ b/doc/pamusb.conf
@@ -40,8 +40,8 @@ See http://www.pamusb.org/doc/configuring
 			<user id="scox">
 				<device>MyDevice</device>
 				<option name="quiet">true</option>
-				<agent event="lock">gnome-screensaver-command -lock</agent>
-				<agent event="unlock">gnome-screensaver-command -deactivate</agent>
+				<agent event="lock">gnome-screensaver-command --lock</agent>
+				<agent event="unlock">gnome-screensaver-command --deactivate</agent>
 			</user>
 
 			Configure user root to authenticate using MyDevice, but update one