diff --git a/ubuntu_14_04_locale_fix/Dockerfile b/ubuntu_14_04_locale_fix/Dockerfile
index 2fa56086..bda4d76c 100644
--- a/ubuntu_14_04_locale_fix/Dockerfile
+++ b/ubuntu_14_04_locale_fix/Dockerfile
@@ -1 +1,6 @@
 FROM ubuntu:14.04
+
+# Setting the language and encoding won't work without this tweak.
+# See bug here ( https://bugs.launchpad.net/ubuntu/+bug/920601 ).
+RUN DEBIAN_FRONTEND=noninteractive locale-gen en_US.UTF-8 && \
+    DEBIAN_FRONTEND=noninteractive dpkg-reconfigure locales