--- a/Platforms/Wasm/default-library.js	Thu Jan 31 19:23:12 2019 +0100
+++ b/Platforms/Wasm/default-library.js	Tue Feb 26 21:15:20 2019 +0100
@@ -2,10 +2,10 @@
 
 mergeInto(LibraryManager.library, {
   ScheduleWebViewportRedrawFromCpp: function(cppViewportHandle) {
-    ScheduleWebViewportRedraw(cppViewportHandle);
+    window.ScheduleWebViewportRedraw(cppViewportHandle);
   },
   CreateWasmViewportFromCpp: function(htmlCanvasId) {
-    return CreateWasmViewport(htmlCanvasId);
+    return window.CreateWasmViewport(htmlCanvasId);
   },
   // each time the StoneApplication updates its status, it may signal it through this method. i.e, to change the status of a button in the web interface
   UpdateStoneApplicationStatusFromCpp: function(statusUpdateMessage) {
@@ -13,4 +13,3 @@
     UpdateWebApplication(statusUpdateMessage_);
   }
 });
-  
\ No newline at end of file