diff --git a/app/session.js b/app/session.js
index cdc27a62..f6dbecab 100644
--- a/app/session.js
+++ b/app/session.js
@@ -24,7 +24,7 @@ module.exports = class Session extends EventEmitter {
   constructor ({ rows, cols: columns, cwd, shell }) {
     super();
     const baseEnv = Object.assign({}, process.env, {
-      LANG: app.getLocale().replace('-', '_'),
+      LANG: app.getLocale().replace('-', '_') + '.UTF-8',
       TERM: 'xterm-256color',
       TERM_PROGRAM: productName,
       TERM_PROGRAM_VERSION: version