diff --git a/misc/docker/debian-7-i386/Dockerfile b/misc/docker/debian-7-i386/Dockerfile
index ec24b5dd..a569f13f 100644
--- a/misc/docker/debian-7-i386/Dockerfile
+++ b/misc/docker/debian-7-i386/Dockerfile
@@ -1,6 +1,6 @@
 FROM i386/debian:wheezy-slim
 ENV DEBIAN_FRONTEND noninteractive
-RUN sed -i 'http://archive.debian.org/debian/'
+RUN echo 'http://archive.debian.org/debian/' >> /etc/apt/sources.list
 RUN apt-get -y update
 RUN apt-get -y upgrade
 RUN apt-get -y install \