diff --git a/Dockerfile b/Dockerfile
index c967a72..82a7faf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,6 @@ RUN mkdir /terasology \
     && wget -P /terasology http://jenkins.terasology.org/job/DistroOmega/lastSuccessfulBuild/artifact/distros/omega/build/distributions/TerasologyOmega.zip \
     && unzip /terasology/TerasologyOmega.zip -d /terasology \
     && rm -f /terasology/TerasologyOmega.zip
-ENTRYPOINT java -jar /terasology/libs/Terasology.jar -headless -homedir=/terasology/server
+ENTRYPOINT java -Dterasology_variant=unstable -jar /terasology/libs/Terasology.jar -headless -homedir=/terasology/server
 VOLUME /terasology/server
 EXPOSE 25777