diff --git a/crates/gpui2/src/subscription.rs b/crates/gpui2/src/subscription.rs
index 744e83bbbddda1a6e6264fa62f81fb23c30f6830..2f4ec0d2f13212440fe7d23585781bac7b2be069 100644
--- a/crates/gpui2/src/subscription.rs
+++ b/crates/gpui2/src/subscription.rs
@@ -38,7 +38,7 @@ where
         lock.subscribers
             .entry(emitter_key.clone())
             .or_default()
-            .insert(Default::default())
+            .get_or_insert_with(|| Default::default())
             .insert(subscriber_id, callback);
         let this = self.0.clone();
         Subscription {