diff --git a/stlinkv3_spi.c b/stlinkv3_spi.c
index 68790cf..50b5c85 100644
--- a/stlinkv3_spi.c
+++ b/stlinkv3_spi.c
@@ -507,7 +507,7 @@
 	if (register_shutdown(stlinkv3_spi_shutdown, NULL))
 		goto init_err_cleanup_exit;
 
-	if (register_spi_master(&spi_programmer_stlinkv3))
+	if (register_spi_master(&spi_programmer_stlinkv3, NULL))
 		return 1; /* shutdown function does cleanup */
 
 	return 0;