diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index 6bca57896915..e6ba768ab01c 100644
--- a/drivers/vhost/vsock.c
+++ b/drivers/vhost/vsock.c
@@ -516,6 +516,8 @@ static int vhost_vsock_dev_open(struct inode *inode, struct file *file)
 		goto out;
 	}
 
+	vsock->guest_cid = 0; /* no CID assigned yet */
+
 	atomic_set(&vsock->queued_replies, 0);
 
 	vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX];