diff --git a/js/child-preload.js b/js/child-preload.js
index 90228884..4d722cc7 100644
--- a/js/child-preload.js
+++ b/js/child-preload.js
@@ -17,8 +17,9 @@ const local = {
     ipcRenderer: ipcRenderer
 }
 
-// JS can detect if in wrapper mode by looking for window.ELECTRON_API obj
-window.ELECTRON_API = {
+// JS can detect if in wrapper mode by looking for window.SYM_API obj
+// API exposes by Symphony to a child window:
+window.SYM_API = {
 };
 
-Object.freeze(window.ELECTRON_API);
+Object.freeze(window.SYM_API);
diff --git a/js/main-preload.js b/js/main-preload.js
index 6e12179d..fdc9909a 100644
--- a/js/main-preload.js
+++ b/js/main-preload.js
@@ -17,8 +17,9 @@ const local = {
     ipcRenderer: ipcRenderer
 }
 
-// JS can detect if in wrapper mode by looking for window.ELECTRON_API obj
-window.ELECTRON_API = {
+// JS can detect if in container mode by looking for window.SYM_API obj
+// API exposes by Symphony to main window:
+window.SYM_API = {
     openWindow: function(url) {
         local.ipcRenderer.send('symphony-msg', {
             cmd: 'open',
@@ -27,4 +28,4 @@ window.ELECTRON_API = {
     }
 };
 
-Object.freeze(window.ELECTRON_API);
+Object.freeze(window.SYM_API);