diff --git a/_plugins/jekyll-mathjax.rb b/_plugins/jekyll-mathjax.rb
index 1130d1b0832434..748e348f1ddebe 100644
--- a/_plugins/jekyll-mathjax.rb
+++ b/_plugins/jekyll-mathjax.rb
@@ -9,7 +9,7 @@
   # both in inline mode \\( .. \\) and block mode $$ ..$$
   if page.content
     page.content = page.content.gsub(/\$\$(.*?)\$\$/) { |m| m.gsub('_', '\\\\_') }
-    page.content = page.content.gsub(/\\\\\((.*?)\\\\\)/) { |m| m.gsub('_','\\\\_') }
+    page.content = page.content.gsub(/\\\\\((.*?)\\\\\)/) { |m| m.gsub('_', '\\\\_') }
 
   end
 end