diff --git a/bin/gollum b/bin/gollum
index f4ef13fb..edf4215e 100755
--- a/bin/gollum
+++ b/bin/gollum
@@ -65,8 +65,8 @@ opts = OptionParser.new do |opts|
     wiki_options[:live_preview] = false
   end
 
-  opts.on("--no-mathjax", "Disables mathjax.") do
-    options['mathjax'] = false
+  opts.on("--mathjax", "Enables mathjax.") do
+    options['mathjax'] = true
   end
 end
 
diff --git a/lib/gollum/wiki.rb b/lib/gollum/wiki.rb
index 70337a0d..e803a297 100644
--- a/lib/gollum/wiki.rb
+++ b/lib/gollum/wiki.rb
@@ -179,7 +179,7 @@ module Gollum
         self.class.history_sanitization
       @live_preview  = options.fetch(:live_preview, true)
       @universal_toc = options.fetch(:universal_toc, false)
-      @mathjax = options[:mathjax] || true
+      @mathjax = options[:mathjax] || false
     end
 
     # Public: check whether the wiki's git repo exists on the filesystem.