--- a/cmd-if-shell.c
+++ b/cmd-if-shell.c
@@ -40,7 +40,6 @@
 	"bt:", 2, 3,
 	"[-b] " CMD_TARGET_PANE_USAGE " shell-command command [command]",
 	0,
-	NULL,
 	NULL,
 	cmd_if_shell_exec
 };