diff --git a/docs/api/structures/rectangle.md b/docs/api/structures/rectangle.md
index 0cd000699ea..e547573137d 100644
--- a/docs/api/structures/rectangle.md
+++ b/docs/api/structures/rectangle.md
@@ -4,3 +4,5 @@
 * `y` Number - The y coordinate of the origin of the rectangle
 * `width` Number
 * `height` Number
+
+Note numeric values must be integers.