diff --git a/packages/build-info/src/settings/netlify-toml.ts b/packages/build-info/src/settings/netlify-toml.ts
index 0516c94838..1a0bd177f8 100644
--- a/packages/build-info/src/settings/netlify-toml.ts
+++ b/packages/build-info/src/settings/netlify-toml.ts
@@ -324,7 +324,7 @@ export type RequestHeaders = {
  */
 export type Headers = {
   for: For
-  values?: Values
+  values: Values
 }
 /**
  * Define the actual headers.