diff --git a/lib/docs/main.js b/lib/docs/main.js
index c9c34ffe98..ea734bdee2 100644
--- a/lib/docs/main.js
+++ b/lib/docs/main.js
@@ -1054,7 +1054,7 @@ const NAV_MODES = {
     if (wr.typeRef) return wr.typeRef;
     let resolved = resolveValue(wr);
     if (wr === resolved) {
-      return { type: 0 };
+      return { "undefined": {} };
     }
     return walkResultTypeRef(resolved);
   }