diff --git a/src/hanoidb_nursery.erl b/src/hanoidb_nursery.erl
index 11b1b6a..90e5a85 100644
--- a/src/hanoidb_nursery.erl
+++ b/src/hanoidb_nursery.erl
@@ -142,12 +142,12 @@ do_sync(File, Nursery) ->
         case application:get_env(hanoidb, sync_strategy) of
             {ok, sync} ->
                 file:datasync(File),
-                now();
+                os:timestamp();
             {ok, {seconds, N}} ->
-                MicrosSinceLastSync = timer:now_diff(now(), Nursery#nursery.last_sync),
-                if (MicrosSinceLastSync / 1000000) >= N ->
+                MicrosSinceLastSync = timer:now_diff(os:timestamp(), Nursery#nursery.last_sync),
+                if (MicrosSinceLastSync div 1000000) >= N ->
                         file:datasync(File),
-                        now();
+                        os:timestamp();
                    true ->
                         Nursery#nursery.last_sync
                 end;