diff --git a/demos/resizable/overlay.html b/demos/resizable/overlay.html
index 53529e460..e15876efe 100644
--- a/demos/resizable/overlay.html
+++ b/demos/resizable/overlay.html
@@ -86,6 +86,7 @@
       blocklyDiv.style.top = y + 'px';
       blocklyDiv.style.width = blocklyArea.offsetWidth + 'px';
       blocklyDiv.style.height = blocklyArea.offsetHeight + 'px';
+      Blockly.svgResize(demoWorkspace);
     };
     window.addEventListener('resize', onresize, false);
     onresize();