diff --git a/easeljs/easeljs.d.ts b/easeljs/easeljs.d.ts
index 8bea78425..659fbcb5b 100644
--- a/easeljs/easeljs.d.ts
+++ b/easeljs/easeljs.d.ts
@@ -382,7 +382,7 @@ declare module createjs {
         // properties
         a: number;
         alpha: number;
-        atx: number;
+        tx: number;
         b: number;
         c: number;
         compositeOperation: string;