diff --git a/ogp_spi.c b/ogp_spi.c
index 18e6514..ea1f6b2 100644
--- a/ogp_spi.c
+++ b/ogp_spi.c
@@ -133,7 +133,7 @@
 	if (ogp_spibar == ERROR_PTR)
 		return 1;
 
-	if (register_spi_bitbang_master(&bitbang_spi_master_ogp))
+	if (register_spi_bitbang_master(&bitbang_spi_master_ogp, NULL))
 		return 1;
 
 	return 0;