diff --git a/thrift/compiler/whisker/object.h b/thrift/compiler/whisker/object.h
index ea0ef698c79..78dfcbd9329 100644
--- a/thrift/compiler/whisker/object.h
+++ b/thrift/compiler/whisker/object.h
@@ -53,6 +53,8 @@ namespace whisker {
 //               identifier, and the value is a `whisker::object` (recursive)
 //   * native_object —
 //               User-defined (C++) type with lazily evaluated properties.
+//   * native_function —
+//               User-defined (C++) function that operates on `whisker::object`.
 //
 // Currently, the Whisker templating language only supports i64, null, string,
 // and boolean as literals. However, the evaluation engine can recognize all of
diff --git a/thrift/doc/contributions/whisker.md b/thrift/doc/contributions/whisker.md
index b24bfbb8d6e..b68f44d6206 100644
--- a/thrift/doc/contributions/whisker.md
+++ b/thrift/doc/contributions/whisker.md
@@ -176,10 +176,6 @@ There are three types of `expression`s in Whisker:
   * `{{ (uppercase "hello") }}`
   * `{{ (concat (uppercase person.firstName) " " (uppercase person.lastName)) }}`
 
-:::warning
-Function call expressions are only partially implemented.
-:::
-
 :::note
 The `and` and `or` builtin functions short-circuit their evaluation, meaning additional arguments will not be evaluated or checked for errors once the result is determined.
 :::