diff --git a/lib/build.js b/lib/build.js
index 7083e6986f..8463b6d690 100644
--- a/lib/build.js
+++ b/lib/build.js
@@ -141,6 +141,7 @@ function sassVariables (contextPath = '', isLegacyGovukFrontend = false) {
   // Patch missing 'init.scss' before GOV.UK Frontend v4.4.0
   // in plugin versions, but will default to false for internal
   if (isLegacyGovukFrontend) {
+    fileContents += '$govuk-assets-path: $govuk-extensions-url-context + "/govuk-frontend/govuk/assets/";\n'
     fileContents += '$govuk-global-styles: true !default;\n'
     fileContents += '$govuk-new-link-styles: true !default;\n'
   }