diff --git a/src/server.rs b/src/server.rs
index aac6014..f8421c6 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -324,7 +324,7 @@ impl NetworkExt for App {
                 connection.send(&PhantomData::<R>);
             }
         };
-        self.add_system(update.run_if(resource_changed::<R>()))
+        self.add_system(update.run_if(resource_exists_and_changed::<R>()))
             .add_system(send.run_if(resource_exists::<R>()))
             .add_system(remove.run_if(resource_removed::<R>()))
     }