diff --git a/scripts/zeekygen/example.zeek b/scripts/zeekygen/example.zeek
index 360d044b64..681457d402 100644
--- a/scripts/zeekygen/example.zeek
+++ b/scripts/zeekygen/example.zeek
@@ -173,7 +173,7 @@ export {
 
 # This function isn't exported, so it won't appear anywhere in the generated
 # documentation.  So using ``##``-style comments is pointless here.
-function function_without_proto(tag: string): string
+function function_without_proto(tag: string): string &is_used
     {
     # Zeekygen-style comments only apply to entities at global-scope so
     # Zeekygen doesn't associate the following comments with anything.
diff --git a/testing/btest/Baseline/doc.zeekygen.identifier/test.rst b/testing/btest/Baseline/doc.zeekygen.identifier/test.rst
index 219c92da8b..b24dc870a3 100644
--- a/testing/btest/Baseline/doc.zeekygen.identifier/test.rst
+++ b/testing/btest/Baseline/doc.zeekygen.identifier/test.rst
@@ -240,6 +240,7 @@
    :source-code: zeekygen/example.zeek 176 184
 
    :Type: :zeek:type:`function` (tag: :zeek:type:`string`) : :zeek:type:`string`
+   :Attributes: :zeek:attr:`&is_used`
 
 
 .. zeek:type:: ZeekygenExample::PrivateRecord