diff --git a/src/chrome/content/rules/Documentchecker.com.xml b/src/chrome/content/rules/Documentchecker.com.xml
new file mode 100644
index 000000000000..d18cdbb8d299
--- /dev/null
+++ b/src/chrome/content/rules/Documentchecker.com.xml
@@ -0,0 +1,15 @@
+<!--
+	Nonfunctional hosts in *.documentchecker.com:
+
+	h: http redirect
+	m: certificate mismatch
+	r: connection refused
+	s: self-signed certificate
+	t: timeout on https
+-->
+<ruleset name="Documentchecker.com">
+	<target host="documentchecker.com" />
+	<target host="www.documentchecker.com" />
+
+	<rule from="^http:" to="https:" />
+</ruleset>