diff --git a/source/sdk/flutter/realm-database/serialization.txt b/source/sdk/flutter/realm-database/serialization.txt
index 5820e8d449..88d0fbd0b3 100644
--- a/source/sdk/flutter/realm-database/serialization.txt
+++ b/source/sdk/flutter/realm-database/serialization.txt
@@ -35,6 +35,9 @@ The following data types can be serialized and deserialized:
 - Null
 - Undefined
 
+The SDK does not yet support the following types: Code, CodeWScope, DBPointer,
+DBRef, Regular Expression, and Timestamp. 
+
 For more information and examples on the serialization for each of these types,
 see :manual:`BSON Data Types and Associated Representations </reference/mongodb-extended-json/#bson-data-types-and-associated-representations>`.