diff --git a/arch/um/drivers/vector_kern.h b/arch/um/drivers/vector_kern.h
index d0159082faf0..8fff93a75a92 100644
--- a/arch/um/drivers/vector_kern.h
+++ b/arch/um/drivers/vector_kern.h
@@ -129,7 +129,7 @@ struct vector_private {
 	struct vector_estats estats;
 	struct sock_fprog *bpf;
 
-	char user[0];
+	char user[];
 };
 
 extern int build_transport_data(struct vector_private *vp);
diff --git a/arch/um/drivers/vhost_user.h b/arch/um/drivers/vhost_user.h
index 6c71b6005177..6f147cd3c9f7 100644
--- a/arch/um/drivers/vhost_user.h
+++ b/arch/um/drivers/vhost_user.h
@@ -78,7 +78,7 @@ struct vhost_user_config {
 	u32 offset;
 	u32 size;
 	u32 flags;
-	u8 payload[0]; /* Variable length */
+	u8 payload[]; /* Variable length */
 } __packed;
 
 struct vhost_user_vring_state {