diff --git a/libs/fakeservicemanager/ServiceManager.h b/libs/fakeservicemanager/ServiceManager.h
index 4ef47fb..e26c21b 100644
--- a/libs/fakeservicemanager/ServiceManager.h
+++ b/libs/fakeservicemanager/ServiceManager.h
@@ -19,6 +19,7 @@
 #include <binder/IServiceManager.h>
 
 #include <map>
+#include <optional>
 
 namespace android {
 
@@ -48,6 +49,8 @@
 
     Vector<String16> getDeclaredInstances(const String16& iface) override;
 
+    std::optional<String16> updatableViaApex(const String16& name) override;
+
 private:
     std::map<String16, sp<IBinder>> mNameToService;
 };