1 files changed, 5 insertions, 0 deletions
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 22d5e6b1d7..5f2534e465 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -246,6 +246,11 @@ listeners:
 # See 'ACME support' below to enable auto-provisioning this certificate via
 # Let's Encrypt.
 #
+# If supplying your own, be sure to use a `.pem` file that includes the
+# full certificate chain including any intermediate certificates (for
+# instance, if using certbot, use `fullchain.pem` as your certificate,
+# not `cert.pem`).
+#
 #tls_certificate_path: "CONFDIR/SERVERNAME.tls.crt"
 
 # PEM-encoded private key for TLS