diff --git a/2.7/Dockerfile b/2.7/Dockerfile
index dd99d7727..6ede619fb 100644
--- a/2.7/Dockerfile
+++ b/2.7/Dockerfile
@@ -8,6 +8,10 @@ RUN apt-get purge -y python python-minimal python2.7-minimal
 RUN mkdir /usr/src/python
 WORKDIR /usr/src/python
 
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
 ENV PYTHON_VERSION 2.7.8
 
 RUN curl -SL "https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tar.xz" \
diff --git a/3.3/Dockerfile b/3.3/Dockerfile
index 2b4a4c3da..60d213bb2 100644
--- a/3.3/Dockerfile
+++ b/3.3/Dockerfile
@@ -8,6 +8,10 @@ RUN apt-get purge -y python python-minimal python2.7-minimal
 RUN mkdir /usr/src/python
 WORKDIR /usr/src/python
 
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
 ENV PYTHON_VERSION 3.3.5
 
 RUN curl -SL "https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tar.xz" \
diff --git a/3.4/Dockerfile b/3.4/Dockerfile
index 4fd4a97da..dab31cc42 100644
--- a/3.4/Dockerfile
+++ b/3.4/Dockerfile
@@ -8,6 +8,10 @@ RUN apt-get purge -y python python-minimal python2.7-minimal
 RUN mkdir /usr/src/python
 WORKDIR /usr/src/python
 
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
 ENV PYTHON_VERSION 3.4.1
 
 RUN curl -SL "https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tar.xz" \