diff --git a/VoldNativeService.h b/VoldNativeService.h
index 7de2a67..36b2717 100644
--- a/VoldNativeService.h
+++ b/VoldNativeService.h
@@ -65,8 +65,7 @@
 
     binder::Status remountUid(int32_t uid, int32_t remountMode);
 
-    binder::Status setupAppDir(const std::string& path, const std::string& appDirRoot,
-                               int32_t appUid);
+    binder::Status setupAppDir(const std::string& path, int32_t appUid);
 
     binder::Status createObb(const std::string& sourcePath, const std::string& sourceKey,
                              int32_t ownerGid, std::string* _aidl_return);