diff --git a/services/incremental/IncrementalService.h b/services/incremental/IncrementalService.h
index ca5e4db..8280287 100644
--- a/services/incremental/IncrementalService.h
+++ b/services/incremental/IncrementalService.h
@@ -90,6 +90,8 @@
         return idFromMetadata({(const uint8_t*)metadata.data(), metadata.size()});
     }
 
+    void onDump(int fd);
+
     std::optional<std::future<void>> onSystemReady();
 
     StorageId createStorage(std::string_view mountPoint,