diff --git a/Documentation/btrfs-check.txt b/Documentation/btrfs-check.txt
index 8a8073f5..821bfc9a 100644
--- a/Documentation/btrfs-check.txt
+++ b/Documentation/btrfs-check.txt
@@ -32,6 +32,8 @@ create a new CRC tree.
 create a new extent tree.
 --check-data-csum::
 verify checkums of data blocks.
+--subvol-extents <subvolid>::
+show extent state for a subvolume.
 
 EXIT STATUS
 -----------
diff --git a/cmds-check.c b/cmds-check.c
index 2a5f823d..923fb10c 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -7544,7 +7544,7 @@ static struct option long_options[] = {
 	{ "init-extent-tree", 0, NULL, 0 },
 	{ "check-data-csum", 0, NULL, 0 },
 	{ "backup", 0, NULL, 0 },
-	{ "subvol-extents", no_argument, NULL, 'E' },
+	{ "subvol-extents", 1, NULL, 'E' },
 	{ "qgroup-report", 0, NULL, 'Q' },
 	{ NULL, 0, NULL, 0}
 };
@@ -7560,7 +7560,7 @@ const char * const cmd_check_usage[] = {
 	"--init-extent-tree          create a new extent tree",
 	"--check-data-csum           verify checkums of data blocks",
 	"--qgroup-report             print a report on qgroup consistency",
-	"--subvol-extents            print subvolume extents and sharing state",
+	"--subvol-extents <subvolid> print subvolume extents and sharing state",
 	NULL
 };