diff --git a/Dockerfile b/Dockerfile
index b8cf095..6f86715 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,7 @@ LABEL AlternativeImageName="wollud1969/bukkit-docker"
 ARG BUKKIT_VERSION
 ARG BUILD_DIR=/minecraft-build
 ARG APP_DIR=/minecraft
+ENV APP_DIR ${APP_DIR}
 ARG USER=minecraft
 ARG UID=25565