--- a/cmd-break-pane.c
+++ b/cmd-break-pane.c
@@ -33,7 +33,6 @@
 	"dPF:t:", 0, 0,
 	"[-dP] [-F format] " CMD_TARGET_PANE_USAGE,
 	0,
-	NULL,
 	NULL,
 	cmd_break_pane_exec
 };