diff --git a/VoldNativeService.h b/VoldNativeService.h
index b90c5b8..7b6edfa 100644
--- a/VoldNativeService.h
+++ b/VoldNativeService.h
@@ -99,8 +99,8 @@
     binder::Status mountDefaultEncrypted();
     binder::Status initUser0();
     binder::Status isConvertibleToFbe(bool* _aidl_return);
-    binder::Status mountFstab(const std::string& mountPoint);
-    binder::Status encryptFstab(const std::string& mountPoint);
+    binder::Status mountFstab(const std::string& blkDevice, const std::string& mountPoint);
+    binder::Status encryptFstab(const std::string& blkDevice, const std::string& mountPoint);
 
     binder::Status createUserKey(int32_t userId, int32_t userSerial, bool ephemeral);
     binder::Status destroyUserKey(int32_t userId);