diff --git a/lib/vhost/vhost_internal.h b/lib/vhost/vhost_internal.h
index be29e9d8b..61106f860 100644
--- a/lib/vhost/vhost_internal.h
+++ b/lib/vhost/vhost_internal.h
@@ -126,7 +126,7 @@ struct spdk_vhost_session {
 	int vid;
 
 	/* Unique session ID. */
-	unsigned id;
+	uint64_t id;
 
 	struct vhost_poll_group *poll_group;