diff --git a/src/world.rs b/src/world.rs
index 0f7572e..bb80762 100644
--- a/src/world.rs
+++ b/src/world.rs
@@ -457,9 +457,15 @@ impl World {
         }
     }
 
+    async fn ready_io(&mut self) {
+        let inbox = do_io(vec![MsgOut::Ready]).await;
+        self.fill_buffers(inbox);
+        self.last_io = now();
+    }
+
     pub async fn run(&mut self) {
         self.activate_main();
-        do_io(vec![MsgOut::Ready]).await;
+        self.ready_io().await;
         loop {
             self.maybe_do_io().await;
             if self.kill_signal {