diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 19955316..ac9108a0 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -109,7 +109,7 @@
 
 {{- /* RSS */}}
 {{ range .AlternativeOutputFormats -}}
-<link rel="{{ .Rel }}" type="{{ .MediaType.Type }}" href="{{ .Permalink | safeURL }}">
+<link rel="{{ .Rel }}" type="{{ .MediaType.Type | html }}" href="{{ .Permalink | safeURL }}">
 {{ end -}}
 {{- range .AllTranslations -}}
 <link rel="alternate" hreflang="{{ .Lang }}" href="{{ .Permalink }}" />