diff --git a/themes/justatheory/layouts/partials/header.html b/themes/justatheory/layouts/partials/header.html
index 628d1f9e..a1221190 100644
--- a/themes/justatheory/layouts/partials/header.html
+++ b/themes/justatheory/layouts/partials/header.html
@@ -15,7 +15,7 @@
 	<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
 	<link rel="manifest" href="/site.webmanifest" />
 	<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#2d2d2d" />{{ if and .Site.Params.octothorpes .Params.tags }}
-	<link rel="preload" as="fetch" href="https://octothorp.esc/?{{ .Permalink }}" />
+	<link rel="preload" as="fetch" {{ printf "href=\"https://octothorp.esc/?%v\"" .Permalink | safeHTMLAttr }}>
 	{{- range .Params.tags }}
 	  <link rel="octo:octothorpes" href="{{ . | urlize }}" />
 	{{- end }}{{ end }}