diff --git a/lib/transforms/babel-plugin-remove-imports.js b/lib/transforms/babel-plugin-remove-imports.js
index f112df29877..2b4b92631ab 100644
--- a/lib/transforms/babel-plugin-remove-imports.js
+++ b/lib/transforms/babel-plugin-remove-imports.js
@@ -1,3 +1,5 @@
+'use strict';
+
 function PluginRemoveFilteredImports() {
   var importDeclarationsToRemove;
   var filteredImports;