diff --git a/doc/source/conf.py b/doc/source/conf.py
index 2f39b0b3..c2179b41 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -199,7 +199,7 @@ htmlhelp_basename = 'scikitimagedoc'
 # -- Options for LaTeX output --------------------------------------------------
 
 # The paper size ('letter' or 'a4').
-latex_paper_size = 'a4'
+#latex_paper_size = 'letter'
 
 # The font size ('10pt', '11pt' or '12pt').
 latex_font_size = '10pt'