diff --git a/packages/host/app/services/card-type-service.ts b/packages/host/app/services/card-type-service.ts
index 85e4d88b692..b6c1ab43139 100644
--- a/packages/host/app/services/card-type-service.ts
+++ b/packages/host/app/services/card-type-service.ts
@@ -11,6 +11,7 @@ import {
   getAncestor,
   SupportedMimeType,
   isResolvedCodeRef,
+  cardIdToURL,
   type ResolvedCodeRef,
 } from '@cardstack/runtime-common';
 import { isCodeRef, type CodeRef } from '@cardstack/runtime-common/code-ref';
@@ -121,7 +122,7 @@ export default class CardTypeService extends Service {
     let moduleIdentifier = moduleFrom(ref);
     let moduleInfo =
       this.moduleInfoCache.get(moduleIdentifier) ??
-      (await this.fetchModuleInfo(new URL(moduleIdentifier)));
+      (await this.fetchModuleInfo(cardIdToURL(moduleIdentifier)));
 
     let api = await loader.import<typeof CardAPI>(`${baseRealm.url}card-api`);
     let { id: _remove, ...fields } = api.getFields(card, {
diff --git a/packages/host/app/services/store.ts b/packages/host/app/services/store.ts
index 5f10f4ee948..d9d82956f7f 100644
--- a/packages/host/app/services/store.ts
+++ b/packages/host/app/services/store.ts
@@ -2132,7 +2132,7 @@ async function withStubbedRenderTimers<T>(cb: () => Promise<T>): Promise<T> {
 // - a directory
 function resolveDocUrl(id?: string, realm?: string, local?: string) {
   if (id) {
-    return id;
+    return isRegisteredPrefix(id) ? cardIdToURL(id).href : id;
   }
   if (!realm) {
     throw new Error('Cannot resolve target url without a realm');