diff --git a/.changeset/fifty-turtles-count.md b/.changeset/fifty-turtles-count.md
new file mode 100644
index 0000000000..76bea0dcaa
--- /dev/null
+++ b/.changeset/fifty-turtles-count.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Add missing route ref to the `/alpha` entity content extension.
diff --git a/plugins/techdocs/src/alpha.tsx b/plugins/techdocs/src/alpha.tsx
index e0e1c1761e..a9ac353753 100644
--- a/plugins/techdocs/src/alpha.tsx
+++ b/plugins/techdocs/src/alpha.tsx
@@ -170,6 +170,7 @@ const techDocsEntityContent = EntityContentBlueprint.makeWithOverrides({
       {
         defaultPath: 'docs',
         defaultTitle: 'TechDocs',
+        routeRef: convertLegacyRouteRef(rootCatalogDocsRouteRef),
         loader: () =>
           import('./Router').then(({ EmbeddedDocsRouter }) =>
             compatWrapper(