diff --git a/mmv1/third_party/terraform/website/docs/guides/version_5_upgrade.html.markdown b/mmv1/third_party/terraform/website/docs/guides/version_5_upgrade.html.markdown
index 89792612fe82..dc37c166f9e8 100644
--- a/mmv1/third_party/terraform/website/docs/guides/version_5_upgrade.html.markdown
+++ b/mmv1/third_party/terraform/website/docs/guides/version_5_upgrade.html.markdown
@@ -114,6 +114,10 @@ Description of the change and how users should adjust their configuration (if ne
 
 The provider will now enforce at plan time that at most one of these fields be set.
 
+### `schema` can only be represented as a JSON array with non-null elements.
+
+The provider will now enforce at plan time that `schema` is a valid JSON array with non-null elements.
+
 ## Resource: `google_firebaserules_release`
 
 ### Changing `ruleset_name` now triggers replacement