diff --git a/drivers/staging/vboxvideo/vbox_ttm.c b/drivers/staging/vboxvideo/vbox_ttm.c
index 55f14c979524..2ea31589d773 100644
--- a/drivers/staging/vboxvideo/vbox_ttm.c
+++ b/drivers/staging/vboxvideo/vbox_ttm.c
@@ -234,7 +234,6 @@ static struct ttm_bo_driver vbox_bo_driver = {
 	.verify_access = vbox_bo_verify_access,
 	.io_mem_reserve = &vbox_ttm_io_mem_reserve,
 	.io_mem_free = &vbox_ttm_io_mem_free,
-	.io_mem_pfn = ttm_bo_default_io_mem_pfn,
 };
 
 int vbox_mm_init(struct vbox_private *vbox)