diff --git a/cmds/idmap2/idmap2d/Idmap2Service.cpp b/cmds/idmap2/idmap2d/Idmap2Service.cpp
index a6c402c..15e22a3 100644
--- a/cmds/idmap2/idmap2d/Idmap2Service.cpp
+++ b/cmds/idmap2/idmap2d/Idmap2Service.cpp
@@ -166,7 +166,7 @@
 Status Idmap2Service::createIdmap(const std::string& target_apk_path,
                                   const std::string& overlay_apk_path, int32_t fulfilled_policies,
                                   bool enforce_overlayable, int32_t user_id ATTRIBUTE_UNUSED,
-                                  aidl::nullable<std::string>* _aidl_return) {
+                                  std::optional<std::string>* _aidl_return) {
   assert(_aidl_return);
   SYSTRACE << "Idmap2Service::createIdmap " << target_apk_path << " " << overlay_apk_path;
   _aidl_return->reset();
@@ -214,7 +214,7 @@
     return error("failed to write to idmap path " + idmap_path);
   }
 
-  *_aidl_return = aidl::make_nullable<std::string>(idmap_path);
+  *_aidl_return = idmap_path;
   return ok();
 }
 
diff --git a/cmds/idmap2/idmap2d/Idmap2Service.h b/cmds/idmap2/idmap2d/Idmap2Service.h
index 55fb5ad..abee999 100644
--- a/cmds/idmap2/idmap2d/Idmap2Service.h
+++ b/cmds/idmap2/idmap2d/Idmap2Service.h
@@ -19,7 +19,6 @@
 
 #include <android-base/unique_fd.h>
 #include <binder/BinderService.h>
-#include <binder/Nullable.h>
 
 #include "android/os/BnIdmap2.h"
 
@@ -45,7 +44,7 @@
   binder::Status createIdmap(const std::string& target_apk_path,
                              const std::string& overlay_apk_path, int32_t fulfilled_policies,
                              bool enforce_overlayable, int32_t user_id,
-                             aidl::nullable<std::string>* _aidl_return) override;
+                             std::optional<std::string>* _aidl_return) override;
 
  private:
   // Cache the crc of the android framework package since the crc cannot change without a reboot.