diff --git a/src/js/includes/ApertureHandler.js b/src/js/includes/ApertureHandler.js
index 08e11cd..54ac971 100644
--- a/src/js/includes/ApertureHandler.js
+++ b/src/js/includes/ApertureHandler.js
@@ -38,12 +38,13 @@ function ApertureHandler(canvas) {
             o.visible = true;
         });
 
+        active[0].width= active[1].width = canvas.width;
+        active[0].height = active[1].height = canvas.height;
+
         if (axis === 'y') {
-            active[0].width= active[1].width = canvas.width;
             active[0].top = viewport.top - active[0].height + 0.5;
             active[1].top = viewport.top + viewport.height - 0.5;
         } else {
-            active[0].height = active[1].height = canvas.height;
             active[0].left = viewport.left - active[0].width + 0.5;
             active[1].left = viewport.left + viewport.width - 0.5;
         }