diff --git a/lib/babel/generation/index.js b/lib/babel/generation/index.js
index 78ee131d6e..a5d3904552 100644
--- a/lib/babel/generation/index.js
+++ b/lib/babel/generation/index.js
@@ -15,7 +15,6 @@ var Position     = require("./position");
 var messages     = require("../messages");
 var Buffer       = require("./buffer");
 var extend       = require("lodash/object/extend");
-var merge        = require("lodash/object/merge");
 var each         = require("lodash/collection/each");
 var n            = require("./node");
 var t            = require("../types");
diff --git a/lib/babel/transformation/transformers/other/use-strict.js b/lib/babel/transformation/transformers/other/use-strict.js
index 7420db08ae..5ce37145f8 100644
--- a/lib/babel/transformation/transformers/other/use-strict.js
+++ b/lib/babel/transformation/transformers/other/use-strict.js
@@ -3,12 +3,10 @@
 var messages = require("../../../messages");
 var t        = require("../../../types");
 
-exports.Program = {
-  enter: function (program, parent, scope, file) {
-    var first = program.body[0];
-    if (t.isExpressionStatement(first) && t.isLiteral(first.expression, { value: "use strict" })) {
-      program.body.shift();
-    }
+exports.Program = function (program) {
+  var first = program.body[0];
+  if (t.isExpressionStatement(first) && t.isLiteral(first.expression, { value: "use strict" })) {
+    program.body.shift();
   }
 };