diff --git a/WHATS_NEW b/WHATS_NEW
index 12845ab0e..834cf0f76 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.105 -
 =====================================
+  Mark lvm1 format metadata as FMT_OBSOLETE. Do not use it with lvmetad.
   Invalidate cached VG struct after a PV in it gets orphaned. (2.02.87)
   Mark pool format metadata as FMT_OBSOLETE.
   Use major:minor in lvm2-pvscan@.service for proper global_filter application.
diff --git a/lib/format1/format1.c b/lib/format1/format1.c
index 509167a56..16746e3fc 100644
--- a/lib/format1/format1.c
+++ b/lib/format1/format1.c
@@ -603,7 +603,7 @@ struct format_type *init_format(struct cmd_context *cmd)
 	fmt->alias = NULL;
 	fmt->orphan_vg_name = FMT_LVM1_ORPHAN_VG_NAME;
 	fmt->features = FMT_RESTRICTED_LVIDS | FMT_ORPHAN_ALLOCATABLE |
-			FMT_RESTRICTED_READAHEAD;
+			FMT_RESTRICTED_READAHEAD | FMT_OBSOLETE;
 	fmt->private = NULL;
 
 	dm_list_init(&fmt->mda_ops);