diff --git a/core-buffer/src/FastH5Writer.cpp b/core-buffer/src/FastH5Writer.cpp
index b85a292..8c80af4 100644
--- a/core-buffer/src/FastH5Writer.cpp
+++ b/core-buffer/src/FastH5Writer.cpp
@@ -209,6 +209,8 @@ void FastH5Writer::write_scalar_metadata(
             data_type,
             buffer_space,
             disk_space);
+
+    H5Dflush(dataset.getId());
 }
 
 template <>