diff --git a/stubs/defaultConfig.stub.js b/stubs/defaultConfig.stub.js
index 423f12e8a..ff6b40c5c 100644
--- a/stubs/defaultConfig.stub.js
+++ b/stubs/defaultConfig.stub.js
@@ -115,6 +115,7 @@ module.exports = {
       auto: 'auto',
       square: '1 / 1',
       video: '16 / 9',
+      attrs: 'attr(width) / attr(height)'
     },
     backdropBlur: ({ theme }) => theme('blur'),
     backdropBrightness: ({ theme }) => theme('brightness'),