diff --git a/PublicVolume.h b/PublicVolume.h
index 45313ec..fd400f2 100644
--- a/PublicVolume.h
+++ b/PublicVolume.h
@@ -47,7 +47,7 @@
     status_t doDestroy() override;
     status_t doMount() override;
     status_t doUnmount() override;
-    status_t doFormat() override;
+    status_t doFormat(const std::string& fsType) override;
 
     status_t readMetadata();
     status_t initAsecStage();