diff --git a/core/gatsby-theme-docz/lib/onCreateWebpackConfig.js b/core/gatsby-theme-docz/lib/onCreateWebpackConfig.js
index 514ad9325..f6c6ed193 100644
--- a/core/gatsby-theme-docz/lib/onCreateWebpackConfig.js
+++ b/core/gatsby-theme-docz/lib/onCreateWebpackConfig.js
@@ -28,5 +28,5 @@ module.exports = async (params, opts) => {
     })
   }
 
-  run('onCreateWebpackConfig', config, stage === 'develop', args)
+  run('onCreateWebpackConfig', actions, stage === 'develop', args, config)
 }