diff --git a/src/math/Wrap.js b/src/math/Wrap.js
index 5a14191051..b82d3d4f78 100644
--- a/src/math/Wrap.js
+++ b/src/math/Wrap.js
@@ -5,7 +5,7 @@
  */
 
 /**
- * Wrap the given `value` between `min` and `max`.
+ * Wrap the given `value` between `min` and `max - 1`.
  *
  * @function Phaser.Math.Wrap
  * @since 3.0.0