diff --git a/2-ui/1-document/11-coordinates/article.md b/2-ui/1-document/11-coordinates/article.md
index dc5793e053..dd3ee3b306 100644
--- a/2-ui/1-document/11-coordinates/article.md
+++ b/2-ui/1-document/11-coordinates/article.md
@@ -216,7 +216,7 @@ function getCoords(elem) {
   let box = elem.getBoundingClientRect();
 
   return {
-    top: box.top + pageYOffset,
+    bottom: box.bottom + pageYOffset,
     left: box.left + pageXOffset
   };
 }