diff --git a/openedx/core/djangoapps/user_authn/views/register.py b/openedx/core/djangoapps/user_authn/views/register.py
index ab57687d2cd4..5af0d1c9a763 100644
--- a/openedx/core/djangoapps/user_authn/views/register.py
+++ b/openedx/core/djangoapps/user_authn/views/register.py
@@ -590,7 +590,7 @@ def post(self, request):
             errors = {
                 "error_message": [{"user_message": str(exc)}],
             }
-            return self._create_response(request, errors, status_code=exc.status_code)
+            return self._create_response(request, errors, status_code=exc.status_code, error_code=exc.error_code)
 
         response = self._handle_duplicate_email_username(request, data)
         if response: