diff --git a/packages/next/server/config-schema.ts b/packages/next/server/config-schema.ts
index dd682dedf4a..b4468f461b1 100644
--- a/packages/next/server/config-schema.ts
+++ b/packages/next/server/config-schema.ts
@@ -414,8 +414,8 @@ const configSchema = {
       isFunction: true,
     } as any,
     generateEtags: {
-      isFunction: true,
-    } as any,
+      type: 'boolean',
+    },
     headers: {
       isFunction: true,
     } as any,