diff --git a/samples/vfio-mdev/mdpy-fb.c b/samples/vfio-mdev/mdpy-fb.c
index 2719bb259653..21dbf63d6e41 100644
--- a/samples/vfio-mdev/mdpy-fb.c
+++ b/samples/vfio-mdev/mdpy-fb.c
@@ -86,7 +86,7 @@ static void mdpy_fb_destroy(struct fb_info *info)
 		iounmap(info->screen_base);
 }
 
-static struct fb_ops mdpy_fb_ops = {
+static const struct fb_ops mdpy_fb_ops = {
 	.owner		= THIS_MODULE,
 	.fb_destroy	= mdpy_fb_destroy,
 	.fb_setcolreg	= mdpy_fb_setcolreg,