diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index dc23717..09a5530 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -662,7 +662,7 @@
 
                 void        dump(int fd, const Vector<String16>& args);
                 // returns a string of audio performance related data in JSON format.
-    virtual     std::string getJsonString() const;
+    virtual     Json::Value getJsonDump() const;
 
     // Thread virtuals
     virtual     bool        threadLoop();
@@ -1108,7 +1108,7 @@
     virtual     bool        checkForNewParameter_l(const String8& keyValuePair,
                                                    status_t& status);
     virtual     void        dumpInternals(int fd, const Vector<String16>& args);
-                std::string getJsonString() const override;
+                Json::Value getJsonDump() const override;
 
     virtual     bool        isTrackAllowed_l(
                                     audio_channel_mask_t channelMask, audio_format_t format,