1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index bfef604160d1..62eab43152d2 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -158,7 +158,7 @@ static inline s64 towards_target(struct virtio_balloon *vb)
         vb->vdev->config->get(vb->vdev,
                               offsetof(struct virtio_balloon_config, num_pages),
                               &v, sizeof(v));
-        return v - vb->num_pages;
+        return (s64)v - vb->num_pages;
 }
 
 static void update_balloon_size(struct virtio_balloon *vb)