diff --git a/HISTORY.md b/HISTORY.md
index 38ce20baa..57bc4f5d9 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -70,6 +70,7 @@
 * Add Transaction::SetReadTimestampForValidation() and Transaction::SetCommitTimestamp(). Default impl returns NotSupported().
 * Add support for decimal patterns to ObjectLibrary::PatternEntry
 * Remove deprecated remote compaction APIs `CompactionService::Start()` and `CompactionService::WaitForComplete()`. Please use `CompactionService::StartV2()`, `CompactionService::WaitForCompleteV2()` instead, which provides the same information plus extra data like priority, db_id, etc.
+* `ColumnFamilyOptions::OldDefaults` and `DBOptions::OldDefaults` are marked deprecated, as they are no longer maintained.
 * Add subcompaction callback APIs: `OnSubcompactionBegin()` and `OnSubcompactionCompleted()`.
 
 ### Behavior Changes
diff --git a/include/rocksdb/options.h b/include/rocksdb/options.h
index bc47ba410..edbd40b9d 100644
--- a/include/rocksdb/options.h
+++ b/include/rocksdb/options.h
@@ -65,6 +65,10 @@ using FileTypeSet = SmallEnumSet<FileType, FileType::kBlobFile>;
 struct ColumnFamilyOptions : public AdvancedColumnFamilyOptions {
   // The function recovers options to a previous version. Only 4.6 or later
   // versions are supported.
+  // NOT MAINTAINED: This function has not been and is not maintained.
+  // DEPRECATED: This function might be removed in a future release.
+  // In general, defaults are changed to suit broad interests. Opting
+  // out of a change on upgrade should be deliberate and considered.
   ColumnFamilyOptions* OldDefaults(int rocksdb_major_version = 4,
                                    int rocksdb_minor_version = 6);
 
@@ -427,6 +431,10 @@ class CompactionService : public Customizable {
 
 struct DBOptions {
   // The function recovers options to the option as in version 4.6.
+  // NOT MAINTAINED: This function has not been and is not maintained.
+  // DEPRECATED: This function might be removed in a future release.
+  // In general, defaults are changed to suit broad interests. Opting
+  // out of a change on upgrade should be deliberate and considered.
   DBOptions* OldDefaults(int rocksdb_major_version = 4,
                          int rocksdb_minor_version = 6);