diff --git a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
index dd739e6..03d8432 100644
--- a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
+++ b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
@@ -28,21 +28,19 @@
 class ContextHub : public BnContextHub {
     ::ndk::ScopedAStatus getContextHubs(std::vector<ContextHubInfo>* out_contextHubInfos) override;
     ::ndk::ScopedAStatus loadNanoapp(int32_t in_contextHubId, const NanoappBinary& in_appBinary,
-                                     int32_t in_transactionId, bool* _aidl_return) override;
+                                     int32_t in_transactionId) override;
     ::ndk::ScopedAStatus unloadNanoapp(int32_t in_contextHubId, int64_t in_appId,
-                                       int32_t in_transactionId, bool* _aidl_return) override;
+                                       int32_t in_transactionId) override;
     ::ndk::ScopedAStatus disableNanoapp(int32_t in_contextHubId, int64_t in_appId,
-                                        int32_t in_transactionId, bool* _aidl_return) override;
+                                        int32_t in_transactionId) override;
     ::ndk::ScopedAStatus enableNanoapp(int32_t in_contextHubId, int64_t in_appId,
-                                       int32_t in_transactionId, bool* _aidl_return) override;
+                                       int32_t in_transactionId) override;
     ::ndk::ScopedAStatus onSettingChanged(Setting in_setting, bool in_enabled) override;
-    ::ndk::ScopedAStatus queryNanoapps(int32_t in_contextHubId, bool* _aidl_return) override;
-    ::ndk::ScopedAStatus registerCallback(int32_t in_contextHubId,
-                                          const std::shared_ptr<IContextHubCallback>& in_cb,
-                                          bool* _aidl_return) override;
+    ::ndk::ScopedAStatus queryNanoapps(int32_t in_contextHubId) override;
+    ::ndk::ScopedAStatus registerCallback(
+            int32_t in_contextHubId, const std::shared_ptr<IContextHubCallback>& in_cb) override;
     ::ndk::ScopedAStatus sendMessageToHub(int32_t in_contextHubId,
-                                          const ContextHubMessage& in_message,
-                                          bool* _aidl_return) override;
+                                          const ContextHubMessage& in_message) override;
     ::ndk::ScopedAStatus onHostEndpointConnected(const HostEndpointInfo& in_info) override;
 
     ::ndk::ScopedAStatus onHostEndpointDisconnected(char16_t in_hostEndpointId) override;