diff --git a/sys/dev/mlx5/driver.h b/sys/dev/mlx5/driver.h
index 5a6c2874dc3f..88c10019785d 100644
--- a/sys/dev/mlx5/driver.h
+++ b/sys/dev/mlx5/driver.h
@@ -518,7 +518,7 @@ struct mlx5_priv {
 	/* pages stuff */
 	struct workqueue_struct *pg_wq;
 	struct rb_root		page_root;
-	int			fw_pages;
+	s64			fw_pages;
 	atomic_t		reg_pages;
 	struct list_head	free_list;