diff --git a/docs/guide/visualization.rst b/docs/guide/visualization.rst
index 1b0b925..b0b354e 100644
--- a/docs/guide/visualization.rst
+++ b/docs/guide/visualization.rst
@@ -36,7 +36,7 @@ computer to find what gives you the best rendering results.
 ::
 
     trimesh_vtk.render_actors([mesh_actor],
-                              filename='my_image.png'
+                              filename='my_image.png',
                               do_save=True,
                               video_width=1600,
                               video_height=1200)
@@ -251,4 +251,4 @@ Below is a simple example for encoding a movie as an mp4 after installing moviep
     clip.write_videofile('reveal_axon_movie.mp4')
 
 moviepy <https://zulko.github.io/moviepy/> has some great documentation that tells you how you can add text, 
-stitch clips together, perform fancy cross fade effects, and all sorts of fun things. 
\ No newline at end of file
+stitch clips together, perform fancy cross fade effects, and all sorts of fun things.