diff --git a/managemon.c b/managemon.c
index bab0397..3cf2389 100644
--- a/managemon.c
+++ b/managemon.c
@@ -396,7 +396,6 @@ static void manage_member(struct mdstat_ent *mdstat,
 	 */
 	// FIXME
 	a->info.array.raid_disks = mdstat->raid_disks;
-	a->info.array.chunk_size = mdstat->chunk_size;
 	// MORE
 
 	if (a->check_degraded) {
diff --git a/mdadm.h b/mdadm.h
index 03dd41c..6aa7fc6 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -358,7 +358,6 @@ struct mdstat_ent {
 	int		resync; /* 1 if resync, 0 if recovery */
 	int		devcnt;
 	int		raid_disks;
-	int		chunk_size;
 	char *		metadata_version;
 	struct dev_member {
 		char			*name;
diff --git a/mdstat.c b/mdstat.c
index 47be2bb..580e87c 100644
--- a/mdstat.c
+++ b/mdstat.c
@@ -185,7 +185,6 @@ struct mdstat_ent *mdstat_read(int hold, int start)
 		ent->resync = 0;
 		ent->metadata_version = NULL;
 		ent->raid_disks = 0;
-		ent->chunk_size = 0;
 		ent->devcnt = 0;
 		ent->members = NULL;