diff --git a/WHATS_NEW b/WHATS_NEW
index aa6c0c62b..b0140beba 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.167 - 
 ======================================
+  Disable lvconvert of thin pool to raid while active.
   Disable systemd service start rate limiting for lvm2-pvscan@.service.
 
 Version 2.02.166 - 26th September 2016
diff --git a/lib/metadata/raid_manip.c b/lib/metadata/raid_manip.c
index deb88a245..f8a3c466b 100644
--- a/lib/metadata/raid_manip.c
+++ b/lib/metadata/raid_manip.c
@@ -776,6 +776,11 @@ static int _raid_add_images_without_commit(struct logical_volume *lv,
 		return 0;
 	}
 
+	if (lv_is_active(lv_lock_holder(lv)) && (old_count == 1) && (lv_is_thin_pool_data(lv) || lv_is_thin_pool_metadata(lv))) {
+		log_error("Can't add image to active thin pool LV %s yet. Deactivate first.", display_lvname(lv));
+		return 0;
+	}
+
 	if (!archive(lv->vg))
 		return_0;