diff --git a/src/babel/messages.js b/src/babel/messages.js
index f06f248083..91381589e1 100644
--- a/src/babel/messages.js
+++ b/src/babel/messages.js
@@ -1,7 +1,7 @@
 import * as util from  "util";
 
 export const MESSAGES = {
-  tailCallReassignmentDeopt: "Function reference has been reassigned so it's probably be dereferenced so we can't optimise this with confidence",
+  tailCallReassignmentDeopt: "Function reference has been reassigned, so it will probably be dereferenced, therefore we can't optimise this with confidence",
   JSXNamespacedTags: "Namespace tags are not supported. ReactJSX is not XML.",
   classesIllegalBareSuper: "Illegal use of bare super",
   classesIllegalSuperCall: "Direct super call is illegal in non-constructor, use super.$1() instead",