diff --git a/src/flux/models/query-subscription.es6 b/src/flux/models/query-subscription.es6
index 5d34151aa..e040ca3c2 100644
--- a/src/flux/models/query-subscription.es6
+++ b/src/flux/models/query-subscription.es6
@@ -67,7 +67,7 @@ export default class QuerySubscription {
     }
   }
 
-  onLastCallbackRemoved = () => {
+  onLastCallbackRemoved() {
 
   }
 
diff --git a/src/flux/models/unread-query-subscription.es6 b/src/flux/models/unread-query-subscription.es6
index 6d57730e7..a7b961269 100644
--- a/src/flux/models/unread-query-subscription.es6
+++ b/src/flux/models/unread-query-subscription.es6
@@ -42,7 +42,7 @@ export default class UnreadQuerySubscription extends MutableQuerySubscription {
     this._query = buildQuery(this._categoryIds).limit(limit).offset(offset);
   }
 
-  onLastCallbackRemoved = () => {
+  onLastCallbackRemoved() {
     this._unlisten();
   }
 }