diff --git a/example.env b/example.env
index e423dd50..c903cc1a 100644
--- a/example.env
+++ b/example.env
@@ -68,6 +68,7 @@ SSL_HOSTNAME=localhost
 SSL_IP_ADDRESSES=127.0.0.1
 SSL_CERT_FILE="./cert.pem"
 SSL_KEY_FILE="./key.pem"
+SSL_CHAIN_FILE="./chain.pem"
 
 # The timezone that the web interface uses.
 USER_TIME_ZONE="Europe/Berlin"