diff --git a/source/mijin/async/coroutine.hpp b/source/mijin/async/coroutine.hpp
index 4302444..2711113 100644
--- a/source/mijin/async/coroutine.hpp
+++ b/source/mijin/async/coroutine.hpp
@@ -340,8 +340,8 @@ struct TaskPromise : impl::TaskReturn<typename TTraits::result_t, TaskPromise<TT
 
     // constexpr void unhandled_exception() MIJIN_NOEXCEPT {}
 
-    template<typename TValue, template<typename> typename TAllocator>
-    auto await_transform(TaskFuturePtr<TValue, TAllocator> future, std::source_location sourceLoc = std::source_location::current()) MIJIN_NOEXCEPT
+    template<typename TValue, template<typename> typename TAllocator2>
+    auto await_transform(TaskFuturePtr<TValue, TAllocator2> future, std::source_location sourceLoc = std::source_location::current()) MIJIN_NOEXCEPT
     {
         MIJIN_ASSERT(loop_ != nullptr, "Cannot await future outside of a loop!");
         sharedState_->sourceLoc = std::move(sourceLoc);