diff --git a/docroot/opencv2/conf.py b/docroot/opencv2/conf.py
index 15a262e60f..181a6d4072 100644
--- a/docroot/opencv2/conf.py
+++ b/docroot/opencv2/conf.py
@@ -184,7 +184,7 @@ latex_documents = [
    u'', 'manual'),
 ]
 
-latex_elements = {'preamble': '\usepackage{mymath}\usepackage{amssymb}\usepackage{amsmath}\usepackage{bbm}'}
+latex_elements = {'preamble': '\usepackage{mymath}\usepackage{amssymb}\usepackage{amsmath}\usepackage{bbm}\setcounter{secnumdepth}{1}'}
 
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.