diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index b84079a..8a62ebe 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -925,7 +925,7 @@
 protected:
     // StreamHalInterfaceCodecFormatCallback implementation
                 void        onCodecFormatChanged(
-            const std::basic_string<uint8_t>& metadataBs) final;
+            const std::vector<uint8_t>& metadataBs) final;
 
     // ThreadBase virtuals
     void preExit() final EXCLUDES_ThreadBase_Mutex;