diff --git a/config/config.exs b/config/config.exs
index 15c1360..a677b8f 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -65,7 +65,8 @@ config :aprs,
   aprs_is_port: 14580,
   aprs_is_default_filter: System.get_env("APRS_FILTER"),
   aprs_is_login_id: System.get_env("APRS_CALLSIGN"),
-  aprs_is_password: System.get_env("APRS_PASSCODE")
+  aprs_is_password: System.get_env("APRS_PASSCODE"),
+  env: config_env()
 
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
diff --git a/lib/aprs/application.ex b/lib/aprs/application.ex
index 8913a1f..e6fca08 100644
--- a/lib/aprs/application.ex
+++ b/lib/aprs/application.ex
@@ -28,7 +28,7 @@ defmodule Aprs.Application do
     ]
 
     children =
-      if Mix.env() in [:prod, :dev] do
+      if Application.get_env(:aprs, :env) in [:prod, :dev] do
         children ++ [Aprs.Is.IsSupervisor]
       else
         children