diff --git a/sys/dev/agp/agp.c b/sys/dev/agp/agp.c
index f7eb906fc57..8db1e13f08d 100644
--- a/sys/dev/agp/agp.c
+++ b/sys/dev/agp/agp.c
@@ -254,7 +254,7 @@ agp_generic_attach(device_t dev)
 	mdargs.mda_uid = UID_ROOT;
 	mdargs.mda_gid = GID_WHEEL;
 	mdargs.mda_mode = 0600;
-	mdargs.mda_si_drv1 = sc;
+	mdargs.mda_si_drv1 = dev;
 	mdargs.mda_si_drv2 = NULL;
 
 	unit = device_get_unit(dev);