diff --git a/xml/System.Text.Json/JsonSerializer.xml b/xml/System.Text.Json/JsonSerializer.xml
index a27333c46a6..10b7f954f3f 100644
--- a/xml/System.Text.Json/JsonSerializer.xml
+++ b/xml/System.Text.Json/JsonSerializer.xml
@@ -41,6 +41,7 @@ For more information, see [How to serialize and deserialize JSON](/dotnet/standa
 
  ]]></format>
     </remarks>
+    <threadsafe>All public static members of <see cref="T:System.Text.Json.JsonSerializer" /> are thread-safe and may be used concurrently from multiple threads. The serializer is designed for thread safety; however, <see cref="T:System.Text.Json.JsonSerializerOptions" /> instances are not thread-safe during initial configuration. Once a <see cref="T:System.Text.Json.JsonSerializerOptions" /> instance is passed to a <see cref="T:System.Text.Json.JsonSerializer" /> method or is otherwise made read-only, it can be safely shared across multiple threads. Avoid concurrent modification of a shared <see cref="T:System.Text.Json.JsonSerializerOptions" /> instance while it is still mutable.</threadsafe>
   </Docs>
   <Members>
     <Member MemberName="Deserialize">