diff --git a/app/assets/stylesheets/govuk-frontend/_all.scss b/app/assets/stylesheets/govuk-frontend/_all.scss
index 9ecefd894..e91af0467 100644
--- a/app/assets/stylesheets/govuk-frontend/_all.scss
+++ b/app/assets/stylesheets/govuk-frontend/_all.scss
@@ -2,6 +2,13 @@
 // Included to allow us to only include the components we need
 // All imports come from node_modules/govuk-frontend
 
+// turn on compatibility mode for all legacy frameworks
+// https://github.com/alphagov/govuk-frontend/blob/master/docs/installation/compatibility.md#turn-on-compatibility-mode
+// to be removed when these frameworks are removed.
+$govuk-compatibility-govukfrontendtoolkit: true;
+$govuk-compatibility-govuktemplate: true;
+$govuk-compatibility-govukelements: true;
+
 // set asset URL root to match that of application
 $govuk-assets-path: "/static/";