diff --git a/src/driver/tpax_driver_ctx.c b/src/driver/tpax_driver_ctx.c
index 7722ae4..0807379 100644
--- a/src/driver/tpax_driver_ctx.c
+++ b/src/driver/tpax_driver_ctx.c
@@ -86,9 +86,9 @@ static int tpax_driver_usage(
 	snprintf(header,sizeof(header),
 		"%s — topological pax implementation\n\n"
 		"Synopsis:\n"
-		"       %s [-d]\n"
-		"       %s -r [-d]\n"
-		"       %s -w [−x format] [-b blocksize] [-d]\n"
+		"       %s [-d] [-f archive]\n"
+		"       %s -r [-d] [-f archive]\n"
+		"       %s -w [−x format] [-b blocksize] [-d] [-f archive]\n"
 		"       %s -r -w [-d]\n\n"
 		"Options:\n",
 		program,program,program,program,program);