diff --git a/LesionTracker/client/components/viewerSection/viewerSection.js b/LesionTracker/client/components/viewerSection/viewerSection.js
index 29f8a978e..1cc88e676 100644
--- a/LesionTracker/client/components/viewerSection/viewerSection.js
+++ b/LesionTracker/client/components/viewerSection/viewerSection.js
@@ -4,7 +4,7 @@ Template.viewerSection.events({
              return;
          }
  
-         handleResize();
+         window.ResizeViewportManager.handleResize();
      }
  });
 
diff --git a/OHIFViewer/client/components/flexboxLayout/flexboxLayout.js b/OHIFViewer/client/components/flexboxLayout/flexboxLayout.js
index a4c909099..264bd7d89 100644
--- a/OHIFViewer/client/components/flexboxLayout/flexboxLayout.js
+++ b/OHIFViewer/client/components/flexboxLayout/flexboxLayout.js
@@ -1,10 +1,10 @@
 Template.flexboxLayout.events({
     'transitionend .sidebarMenu'(event) {
         if (!event.target.classList.contains('sidebarMenu')) {
-        	return;
+            return;
         }
 
-    	handleResize();
+        window.ResizeViewportManager.handleResize();
     }
 });