--- a/cmd-choose-client.c
+++ b/cmd-choose-client.c
@@ -36,7 +36,6 @@
 	"F:t:", 0, 1,
 	CMD_TARGET_WINDOW_USAGE " [-F format] [template]",
 	0,
-	NULL,
 	NULL,
 	cmd_choose_client_exec
 };