diff --git a/exampleSiteMultilingual/hugo.toml b/exampleSiteMultilingual/hugo.toml
index 762083d..2be01ba 100644
--- a/exampleSiteMultilingual/hugo.toml
+++ b/exampleSiteMultilingual/hugo.toml
@@ -25,7 +25,7 @@ readNextPosts = 2
 copyCodeButton = true
 rssAsSocialIcon = true
 locale = "en-us"
-mathjax = true
+math = false # true: enable mathjax globally (default is false)
 toc = true
 
 # Graphcomment support
diff --git a/layouts/partials/header.html b/layouts/partials/header.html
index 1cd71a7..d97227d 100644
--- a/layouts/partials/header.html
+++ b/layouts/partials/header.html
@@ -20,6 +20,7 @@
     <nav></nav>
 {{ end }}
 
-{{ if .Site.Params.mathjax }}{{ partial "mathjax_support.html" . }}{{ end }}
+{{/* .Params is the current page config. .Site.Params is globall config in hugo.toml */}}
+{{ if or .Site.Params.math .Params.math }}{{ partial "mathjax_support.html" . }}{{ end }}
 
 {{ partial "header-extra.html" . }}