diff --git a/reaktive/src/commonMain/kotlin/com/badoo/reaktive/completable/CompletableEmitterSerialize.kt b/reaktive/src/commonMain/kotlin/com/badoo/reaktive/completable/CompletableEmitterSerialize.kt
index 6619f5aae..69a24d853 100644
--- a/reaktive/src/commonMain/kotlin/com/badoo/reaktive/completable/CompletableEmitterSerialize.kt
+++ b/reaktive/src/commonMain/kotlin/com/badoo/reaktive/completable/CompletableEmitterSerialize.kt
@@ -12,7 +12,7 @@ private class SerializedCompletableEmitter(
     private val serializer =
         serializer<Event> { event ->
             when (event) {
-                is Event.OnComplete -> delegate.onComplete()
+                Event.OnComplete -> delegate.onComplete()
                 is Event.OnError -> delegate.onError(event.error)
             }
 
diff --git a/reaktive/src/commonMain/kotlin/com/badoo/reaktive/observable/ObservableEmitterSerialize.kt b/reaktive/src/commonMain/kotlin/com/badoo/reaktive/observable/ObservableEmitterSerialize.kt
index f7a5f957d..2850538d5 100644
--- a/reaktive/src/commonMain/kotlin/com/badoo/reaktive/observable/ObservableEmitterSerialize.kt
+++ b/reaktive/src/commonMain/kotlin/com/badoo/reaktive/observable/ObservableEmitterSerialize.kt
@@ -13,7 +13,7 @@ private class SerializedObservableEmitter<T>(
         serializer<Any?> { event ->
             if (event is Event) {
                 when (event) {
-                    is Event.OnComplete -> delegate.onComplete()
+                    Event.OnComplete -> delegate.onComplete()
                     is Event.OnError -> delegate.onError(event.error)
                 }