diff --git a/packages/gatsby/src/joi-schemas/joi.js b/packages/gatsby/src/joi-schemas/joi.js
index 7388928217b03..d5e32e6ced847 100644
--- a/packages/gatsby/src/joi-schemas/joi.js
+++ b/packages/gatsby/src/joi-schemas/joi.js
@@ -49,7 +49,7 @@ export const nodeSchema = Joi.object()
       type: Joi.string().required(),
       owner: Joi.string().required(),
       fieldOwners: Joi.array(),
-      content: Joi.string(),
+      content: Joi.string().allow(""),
     }),
   })
   .unknown()