diff --git a/HISTORY.md b/HISTORY.md
index 6aa2e8312..ba20a087c 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,6 +2,7 @@
 ## 6.27.3 (2021-12-10)
 ### Bug Fixes
 * Fixed a bug in TableOptions.prepopulate_block_cache which causes segmentation fault when used with TableOptions.partition_filters = true and TableOptions.cache_index_and_filter_blocks = true.
+* Fixed a bug affecting custom memtable factories which are not registered with the `ObjectRegistry`. The bug could result in failure to save the OPTIONS file.
 
 ## 6.27.2 (2021-12-01)
 ### Bug Fixes