diff --git a/tools/lvconvert_poll.c b/tools/lvconvert_poll.c
index b9ec316e1..0eae74616 100644
--- a/tools/lvconvert_poll.c
+++ b/tools/lvconvert_poll.c
@@ -176,7 +176,7 @@ progress_t poll_thin_merge_progress(struct cmd_context *cmd,
 {
 	uint32_t device_id;
 
-	if (!lv_thin_device_id(lv, &device_id)) {
+	if (!lv_thin_device_id(lv, &device_id) && !lv_is_snapshot(lv)) {
 		stack;
 		return PROGRESS_CHECK_FAILED;
 	}