diff --git a/dediprog.c b/dediprog.c
index 7699d6d..2d266d4 100644
--- a/dediprog.c
+++ b/dediprog.c
@@ -528,7 +528,7 @@
 			goto err_free;
 	}
 	/* Wait for transfers to finish. */
-	if (dediprog_bulk_read_poll(dp_data->usb_ctx, &status, 0))
+	if (dediprog_bulk_read_poll(dp_data->usb_ctx, &status, 1))
 		goto err_free;
 	/* Check if everything has been transmitted. */
 	if ((status.finished_idx < count) || status.error)