diff --git a/mu4e/mu4e.texi b/mu4e/mu4e.texi
index 15f99d9d..f0a33a87 100644
--- a/mu4e/mu4e.texi
+++ b/mu4e/mu4e.texi
@@ -3593,7 +3593,7 @@ environment with e.g., your main account:
       smtpmail-default-smtp-server "smtp.account1.tld"
       smtpmail-local-domain "account1.tld"
       smtpmail-smtp-server "smtp.account1.tld"
-      smtpmail-stream-type starttls
+      smtpmail-stream-type 'starttls
       smtpmail-smtp-service 25)
 @end lisp