diff --git a/drivers/staging/vboxvideo/vbox_fb.c b/drivers/staging/vboxvideo/vbox_fb.c
index 8aed248db6e2..43c39eca4ae1 100644
--- a/drivers/staging/vboxvideo/vbox_fb.c
+++ b/drivers/staging/vboxvideo/vbox_fb.c
@@ -170,7 +170,7 @@ static int vboxfb_create(struct drm_fb_helper *helper,
 	drm_fb_helper_fill_var(info, &fbdev->helper, sizes->fb_width,
 			       sizes->fb_height);
 
-	info->screen_base = bo->kmap.virtual;
+	info->screen_base = (char __iomem *)bo->kmap.virtual;
 	info->screen_size = size;
 
 #ifdef CONFIG_DRM_KMS_FB_HELPER
diff --git a/drivers/staging/vboxvideo/vbox_main.c b/drivers/staging/vboxvideo/vbox_main.c
index 80bd039fa08e..973b3bcc04b1 100644
--- a/drivers/staging/vboxvideo/vbox_main.c
+++ b/drivers/staging/vboxvideo/vbox_main.c
@@ -61,7 +61,7 @@ void vbox_enable_accel(struct vbox_private *vbox)
 		if (vbox->vbva_info[i].vbva)
 			continue;
 
-		vbva = (void *)vbox->vbva_buffers + i * VBVA_MIN_BUFFER_SIZE;
+		vbva = (void __force *)vbox->vbva_buffers + i * VBVA_MIN_BUFFER_SIZE;
 		if (!vbva_enable(&vbox->vbva_info[i],
 				 vbox->guest_pool, vbva, i)) {
 			/* very old host or driver error. */