diff --git a/gfxnvidia.c b/gfxnvidia.c
index 5055b8b..253180e 100644
--- a/gfxnvidia.c
+++ b/gfxnvidia.c
@@ -102,7 +102,7 @@
 
 	/* Write/erase doesn't work. */
 	programmer_may_write = false;
-	return register_par_master(&par_master_gfxnvidia, BUS_PARALLEL, NULL);
+	return register_par_master(&par_master_gfxnvidia, BUS_PARALLEL, 0, NULL);
 }
 
 static void gfxnvidia_chip_writeb(const struct flashctx *flash, uint8_t val,