diff --git a/dom/clients/manager/ClientSourceParent.cpp b/dom/clients/manager/ClientSourceParent.cpp
index 80483ab5db9a..dd789c5e7fb3 100644
--- a/dom/clients/manager/ClientSourceParent.cpp
+++ b/dom/clients/manager/ClientSourceParent.cpp
@@ -241,7 +241,7 @@ bool ClientSourceParent::IsFrozen() const { return mFrozen; }
 
 bool ClientSourceParent::ExecutionReady() const { return mExecutionReady; }
 
-RefPtr<GenericNonExclusivePromise> ClientSourceParent::ExecutionReadyPromise() {
+RefPtr<GenericPromise> ClientSourceParent::ExecutionReadyPromise() {
   // Only call if ClientSourceParent::ExecutionReady() is false; otherwise,
   // the promise will never resolve
   MOZ_ASSERT(!mExecutionReady);
diff --git a/dom/clients/manager/ClientSourceParent.h b/dom/clients/manager/ClientSourceParent.h
index 7aa9fe12fef5..0de0b06663f3 100644
--- a/dom/clients/manager/ClientSourceParent.h
+++ b/dom/clients/manager/ClientSourceParent.h
@@ -68,7 +68,7 @@ class ClientSourceParent final : public PClientSourceParent {
 
   bool ExecutionReady() const;
 
-  RefPtr<GenericNonExclusivePromise> ExecutionReadyPromise();
+  RefPtr<GenericPromise> ExecutionReadyPromise();
 
   const Maybe<ServiceWorkerDescriptor>& GetController() const;