diff --git a/src/editors/data/services/cms/urls.js b/src/editors/data/services/cms/urls.js
index 087487894..2d8943019 100644
--- a/src/editors/data/services/cms/urls.js
+++ b/src/editors/data/services/cms/urls.js
@@ -29,9 +29,9 @@ export const returnUrl = ({
 };
 
 export const block = ({ studioEndpointUrl, blockId }) => (
-  blockId.includes('block-v1')
-    ? `${studioEndpointUrl}/xblock/${blockId}`
-    : `${studioEndpointUrl}/api/xblock/v2/xblocks/${blockId}/fields/`
+  blockId.startsWith('lb:')
+    ? `${studioEndpointUrl}/api/xblock/v2/xblocks/${blockId}/fields/`
+    : `${studioEndpointUrl}/xblock/${blockId}`
 );
 
 export const blockAncestor = ({ studioEndpointUrl, blockId }) => {
diff --git a/src/editors/data/services/cms/urls.test.js b/src/editors/data/services/cms/urls.test.js
index f7945ad3d..04c2fa25e 100644
--- a/src/editors/data/services/cms/urls.test.js
+++ b/src/editors/data/services/cms/urls.test.js
@@ -22,7 +22,7 @@ import {
 describe('cms url methods', () => {
   const studioEndpointUrl = 'urLgoeStOstudiO';
   const blockId = 'block-v1-blOckIDTeST123';
-  const v2BlockId = 'blOckIDTeST123';
+  const v2BlockId = 'lb:blOckIDTeST123';
   const learningContextId = 'lEarnIngCOntextId123';
   const libraryLearningContextId = 'library-v1:libaryId123';
   const courseId = 'course-v1:courseId123';