diff --git a/docs/sphinxext/ipython_directive.py b/docs/sphinxext/ipython_directive.py
index bce5d92..c253448 100644
--- a/docs/sphinxext/ipython_directive.py
+++ b/docs/sphinxext/ipython_directive.py
@@ -77,7 +77,7 @@ from docutils.parsers.rst import directives
 from docutils import nodes
 from sphinx.util.compat import Directive
 
-#matplotlib.use('Agg')
+matplotlib.use('Agg')
 
 # Our own
 from IPython import Config, InteractiveShell