diff --git a/packages/gatsby-transformer-documentationjs/src/gatsby-node.js b/packages/gatsby-transformer-documentationjs/src/gatsby-node.js
index 5cc917ec05d8a..fa40cc4256fd5 100644
--- a/packages/gatsby-transformer-documentationjs/src/gatsby-node.js
+++ b/packages/gatsby-transformer-documentationjs/src/gatsby-node.js
@@ -42,7 +42,7 @@ function prepareDescriptionNode(node, markdownStr, name, helpers) {
   return descriptionNode
 }
 
-exports.sourceNodes = ({ actions }) => {
+exports.createSchemaCustomization = ({ actions }) => {
   const { createTypes } = actions
   const typeDefs = /* GraphQL */ `
     type DocumentationJs implements Node