diff --git a/Libraries/Utilities/mergeFast.js b/Libraries/Utilities/mergeFast.js
index e55ac76ed6a1..78a06cb4be41 100644
--- a/Libraries/Utilities/mergeFast.js
+++ b/Libraries/Utilities/mergeFast.js
@@ -13,7 +13,7 @@
 
 /**
  * Faster version of `merge` that doesn't check its arguments and
- * also merges prototye inherited properties.
+ * also merges prototype inherited properties.
  *
  * @param {object} one Any non-null object.
  * @param {object} two Any non-null object.