diff --git a/src/Microsoft.AspNet.Hosting/ConfigureHostingEnvironment.cs b/src/Microsoft.AspNet.Hosting/ConfigureHostingEnvironment.cs
index 420b731122..a714c2cfef 100644
--- a/src/Microsoft.AspNet.Hosting/ConfigureHostingEnvironment.cs
+++ b/src/Microsoft.AspNet.Hosting/ConfigureHostingEnvironment.cs
@@ -8,7 +8,7 @@ namespace Microsoft.AspNet.Hosting
     internal class ConfigureHostingEnvironment : IConfigureHostingEnvironment
     {
         private IConfiguration _config;
-        private const string EnvironmentKey = "KRE_ENV";
+        private const string EnvironmentKey = "ASPNET_ENV";
 
         public ConfigureHostingEnvironment(IConfiguration config)
         {