diff --git a/dump2tar/src/dump2tar.c b/dump2tar/src/dump2tar.c
index 6d0fe6b2..e4fd67ab 100644
--- a/dump2tar/src/dump2tar.c
+++ b/dump2tar/src/dump2tar.c
@@ -110,6 +110,7 @@ static struct util_opt dump2tar_opts[] = {
 	{
 		.option = { "file-timeout", required_argument, NULL, 'T' },
 		.desc = "Stop reading file after SEC seconds",
+		.argument = "SEC",
 	},
 	{
 		.option = { "file-max-size", required_argument, NULL, 'M' },