diff --git a/roles/custom/matrix-bot-matrix-registration-bot/defaults/main.yml b/roles/custom/matrix-bot-matrix-registration-bot/defaults/main.yml
index 1e2864e7f..88c114e48 100644
--- a/roles/custom/matrix-bot-matrix-registration-bot/defaults/main.yml
+++ b/roles/custom/matrix-bot-matrix-registration-bot/defaults/main.yml
@@ -33,7 +33,6 @@ matrix_bot_matrix_registration_bot_api_token: ''
 matrix_bot_matrix_registration_bot_device_id: "matrix-docker-ansible-deploy"
 
 matrix_bot_matrix_registration_bot_logging_level: info
-matrix_bot_matrix_registration_environment_variables_extension: ''
 
 matrix_bot_matrix_registration_bot_container_network: ""