diff --git a/ikiwiki.setup b/ikiwiki.setup
index bc42bb821a..77686330e0 100644
--- a/ikiwiki.setup
+++ b/ikiwiki.setup
@@ -251,7 +251,7 @@ openid_cgiurl: http://git-annex.branchable.com/ikiwiki.cgi
 
 # highlight plugin
 # types of source files to syntax highlight
-tohighlight: .c .h .cpp .pl .py Makefile:make
+tohighlight: ''
 # location of highlight's filetypes.conf
 filetypes_conf: /etc/highlight/filetypes.conf
 # location of highlight's langDefs directory