diff --git a/rc/filetype/mail.kak b/rc/filetype/mail.kak
index 95b7d88a..c99bd68f 100644
--- a/rc/filetype/mail.kak
+++ b/rc/filetype/mail.kak
@@ -15,7 +15,7 @@ hook -group mail-highlight global WinSetOption filetype=mail %{
 provide-module mail %{
 
 add-highlighter shared/mail group
-add-highlighter shared/mail/ regex ^(From|To|Cc|Bcc|Subject|Reply-To|In-Reply-To|Date):([^\n]*(?:\n\h+[^\n]+)*)$ 1:keyword 2:attribute
+add-highlighter shared/mail/ regex ^(From|To|Cc|Bcc|Subject|Reply-To|In-Reply-To|References|Date):([^\n]*(?:\n\h+[^\n]+)*)$ 1:keyword 2:attribute
 add-highlighter shared/mail/ regex <[^@>]+@.*?> 0:string
 add-highlighter shared/mail/ regex ^>.*?$ 0:comment