diff --git a/PrivateVolume.h b/PrivateVolume.h
index bd464e6..95b718d 100644
--- a/PrivateVolume.h
+++ b/PrivateVolume.h
@@ -45,7 +45,7 @@
     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();