diff --git a/knockout/knockout-2.2.d.ts b/knockout/knockout-2.2.d.ts
index fc3137a7db..981752b8ac 100644
--- a/knockout/knockout-2.2.d.ts
+++ b/knockout/knockout-2.2.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for Knockout 2.2
+// Type definitions for Knockout 2.2
 // Project: http://knockoutjs.com
 // Definitions by: Boris Yankov <https://github.com/borisyankov/>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped