diff --git a/src/core/observer/dep.js b/src/core/observer/dep.js
index d344aff9445..974b9541c28 100644
--- a/src/core/observer/dep.js
+++ b/src/core/observer/dep.js
@@ -49,9 +49,9 @@ export default class Dep {
   }
 }
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null
 const targetStack = []