diff --git a/VContainer/Assets/VContainer/Runtime/Internal/InstanceProviders/CollectionInstanceProvider.cs b/VContainer/Assets/VContainer/Runtime/Internal/InstanceProviders/CollectionInstanceProvider.cs
index b90cf9f6..5532c376 100644
--- a/VContainer/Assets/VContainer/Runtime/Internal/InstanceProviders/CollectionInstanceProvider.cs
+++ b/VContainer/Assets/VContainer/Runtime/Internal/InstanceProviders/CollectionInstanceProvider.cs
@@ -98,7 +98,7 @@ internal void CollectFromParentScopes(
                 if (scope.TryGetRegistration(finderType, out var registration) &&
                     registration.Provider is CollectionInstanceProvider parentCollection)
                 {
-                    mergedRegistrations ??= ListPool<Registration>.Get();
+                    mergedRegistrations = mergedRegistrations ?? ListPool<Registration>.Get();
                     mergedRegistrations.AddRange(registrations);
 
                     if (localScopeOnly)