diff --git a/lib/main.js b/lib/main.js
index a7ac5141..70b68e0d 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -271,6 +271,10 @@ Lambda.prototype._setEnvironmentVars = function (program, codeDirectory) {
   var config = dotenv.parse(configValues);
   var contentStr = contents.toString();
 
+  if(program.environment){
+      prefix += 'process.env["environment"]=' + program.environment + ';\n';
+  }
+
   for (var k in config) {
     if (!config.hasOwnProperty(k)) {
       continue;