diff --git a/drivers/xen/tmem.c b/drivers/xen/tmem.c
index c4211a31612d..c87fdee13ee9 100644
--- a/drivers/xen/tmem.c
+++ b/drivers/xen/tmem.c
@@ -395,7 +395,7 @@ static int __init xen_tmem_init(void)
 	}
 #endif
 #ifdef CONFIG_CLEANCACHE
-	BUG_ON(sizeof(struct cleancache_filekey) != sizeof(struct tmem_oid));
+	BUILD_BUG_ON(sizeof(struct cleancache_filekey) != sizeof(struct tmem_oid));
 	if (tmem_enabled && cleancache) {
 		int err;