diff --git a/usr.sbin/powerd/powerd.8 b/usr.sbin/powerd/powerd.8
index a7f442dff1d4..d3c5260691a6 100644
--- a/usr.sbin/powerd/powerd.8
+++ b/usr.sbin/powerd/powerd.8
@@ -83,8 +83,8 @@ to use normally when the AC line state is unknown.
 Specifies a different polling interval (in milliseconds) for AC line state
 and system idle levels.
 The default is 500 ms.
-.It Fl P
-Specify an alternative file in which to store the process ID.
+.It Fl P Ar pidfile
+Specifies an alternative file in which the process ID should be stored.
 The default is
 .Pa /var/run/powerd.pid .
 .It Fl r Ar percent