diff --git a/ssmtp_conf-sample/wanchecker.conf b/ssmtp_conf-sample/wanchecker.conf
index 9bbf251..e5d7331 100644
--- a/ssmtp_conf-sample/wanchecker.conf
+++ b/ssmtp_conf-sample/wanchecker.conf
@@ -17,9 +17,7 @@ ENABLE_FALLBACK_DNS=1
 
 # Email sender
 # Same than in /etc/ssmtp/ssmtp.conf
-EMAIL_SENDER=(
-  mailsender@foo.com
-)
+EMAIL_SENDER="mailsender@foo.com"
 
 # Emails to send notification to
 EMAIL_RECIPIENTS=(