diff --git a/reference.config b/reference.config
index d98096d032..1d1b42d898 100644
--- a/reference.config
+++ b/reference.config
@@ -15,3 +15,5 @@ config reference: et        http://doc.emergingthreats.net/
 config reference: etpro     http://doc.emergingthreatpro.com/
 config reference: telus     http://
 
+config reference: md5       http://www.threatexpert.com/report.aspx?md5=
+