diff --git a/WHATS_NEW b/WHATS_NEW
index 2b897e89d..6ef9d5ca3 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.98 -
 =================================
+  Disallow RAID1 upconvert if the LV was created with --nosync.
   Depend on systemd-udev-settle in units generated by activation generator.
   Fix vgchange -aay to activate proper logical volumes.
   Properly handle 'resync' of RAID LVs.
diff --git a/lib/metadata/raid_manip.c b/lib/metadata/raid_manip.c
index 4eced6fbd..131f9d236 100644
--- a/lib/metadata/raid_manip.c
+++ b/lib/metadata/raid_manip.c
@@ -639,6 +639,18 @@ static int _raid_add_images(struct logical_volume *lv,
 	struct lv_list *lvl;
 	struct lv_segment_area *new_areas;
 
+	if (lv->status & LV_NOTSYNCED) {
+		log_error("Can't add image to out-of-sync RAID LV:"
+			  " use 'lvchange --resync' first.");
+		return 0;
+	}
+
+	if (!_raid_in_sync(lv)) {
+		log_error("Can't add image to RAID LV that"
+			  " is still initializing.");
+		return 0;
+	}
+
 	dm_list_init(&meta_lvs); /* For image addition */
 	dm_list_init(&data_lvs); /* For image addition */