diff --git a/ansible/roles/stack-sunbird/templates/sunbird_player.env b/ansible/roles/stack-sunbird/templates/sunbird_player.env
index 363d70b71590cfd6a9b1363e0402ef196d63e5ac..b11140dd9421ba01229a2877d1def8411e79919d 100644
--- a/ansible/roles/stack-sunbird/templates/sunbird_player.env
+++ b/ansible/roles/stack-sunbird/templates/sunbird_player.env
@@ -156,7 +156,7 @@ sunbird_portal_session_secret={{sunbird_portal_session_secret}}
 
 #release-4.0.0
 sunbird_base_proto={{sunbird_base_proto | default(proto)}}
-ML_SERVICE_BASE_URL={{ml_survey_url|default(proto+'://' +domain_name) }}
+ml_survey_url: {{ml_survey_url|default(proto+'://' +domain_name) }}
 
 #Release-4.1.0
 sunbird_azure_storage_account_name=https://{{sunbird_public_storage_account_name}}.blob.core.windows.net/