diff --git a/crates/bevy_ecs/src/event.rs b/crates/bevy_ecs/src/event.rs
index 7bd966362a8ca..7876eb406794e 100644
--- a/crates/bevy_ecs/src/event.rs
+++ b/crates/bevy_ecs/src/event.rs
@@ -378,6 +378,10 @@ impl<'a, E: Event> Iterator for ManualEventIterator<'a, E> {
         self.iter.next().map(|(event, _)| event)
     }
 
+    fn count(self) -> usize {
+        self.iter.count()
+    }
+
     fn size_hint(&self) -> (usize, Option<usize>) {
         self.iter.size_hint()
     }
@@ -445,6 +449,11 @@ impl<'a, E: Event> Iterator for ManualEventIteratorWithId<'a, E> {
         }
     }
 
+    fn count(self) -> usize {
+        self.reader.last_event_count += self.unread;
+        self.unread
+    }
+
     fn size_hint(&self) -> (usize, Option<usize>) {
         self.chain.size_hint()
     }