diff --git a/extras/doxygen-style/Doxyfile b/extras/doxygen-style/Doxyfile
index 9f690e29e..95c2866e9 100644
--- a/extras/doxygen-style/Doxyfile
+++ b/extras/doxygen-style/Doxyfile
@@ -1192,7 +1192,7 @@ HTML_FOOTER            = custom_footer.html
 # obsolete.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_STYLESHEET        = doxygen.css
+HTML_STYLESHEET        = 
 
 # The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined
 # cascading style sheets that are included after the standard style sheets