diff --git a/transmission_openvpn/README.md b/transmission_openvpn/README.md
index 006071a31..7cfc730e0 100644
--- a/transmission_openvpn/README.md
+++ b/transmission_openvpn/README.md
@@ -37,6 +37,8 @@ comparison to installing any other Hass.io add-on.
 
 Options : see https://github.com/haugene/docker-transmission-openvpn for documentation
 
+For setting a custom openvpn file, you should flag the "OPENVPN_CUSTOM_PROVIDER" field and reference the path of the *.ovpn file in the "OPENVPN_CUSTOM_PROVIDER_OVPN_LOCATION" field.
+
 Complete transmission options are in /config/addons_config/transmission (make sure addon is stopped before modifying it as Transmission writes its ongoing values when stopping and could erase your changes)
 
 Webui can be found at `<your-ip>:9091`.