1 files changed, 2 insertions, 0 deletions
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index bd208b17dd..46af6edf1f 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -940,6 +940,8 @@ uploads_path: "DATADIR/uploads"
 # by the Matrix Identity Service API specification:
 # https://matrix.org/docs/spec/identity_service/latest
 #
+# If a delegate is specified, the config option public_baseurl must also be filled out.
+#
 account_threepid_delegates:
     #email: https://example.com     # Delegate email sending to example.org
     #msisdn: http://localhost:8090  # Delegate SMS sending to this local process