diff --git a/web-nginx-mysql/ubuntu/Dockerfile b/web-nginx-mysql/ubuntu/Dockerfile
index 968adf183..6ed865a3e 100644
--- a/web-nginx-mysql/ubuntu/Dockerfile
+++ b/web-nginx-mysql/ubuntu/Dockerfile
@@ -36,6 +36,7 @@ RUN locale-gen $LC_ALL && \
     apt-get ${APT_FLAGS_COMMON} update && \
     apt-get ${APT_FLAGS_COMMON} install \
             wget 1>/dev/null && \
+    DISTRIB_CODENAME=$(/bin/bash -c 'source /etc/lsb-release && echo $DISTRIB_CODENAME') && \
     wget -q http://nginx.org/keys/nginx_signing.key -O- | apt-key add - && \
     echo "deb http://nginx.org/packages/ubuntu/ $DISTRIB_CODENAME nginx" >> /etc/apt/sources.list.d/nginx.list && \
     apt-get ${APT_FLAGS_COMMON} update && \