diff --git a/lib/commons/dom/get-rect-stack.js b/lib/commons/dom/get-rect-stack.js
index e0a3c564..7af8b9eb 100644
--- a/lib/commons/dom/get-rect-stack.js
+++ b/lib/commons/dom/get-rect-stack.js
@@ -5,9 +5,9 @@ export function getRectStack(
   grid,
   rect,
   recursed = false,
-  isCoordsPassed,
-  x,
-  y
+  isCoordsPassed = false,
+  x = null,
+  y = null
 ) {
   const center = getRectCenter(rect);
   const gridCell = grid.getCellFromPoint(center) || [];