diff --git a/guix-data-service/web/revision/controller.scm b/guix-data-service/web/revision/controller.scm
index c4a25f7..1f30c0b 100644
--- a/guix-data-service/web/revision/controller.scm
+++ b/guix-data-service/web/revision/controller.scm
@@ -612,7 +612,7 @@
       ((application/json)
        (render-json
         `((commit . ,commit-hash)
-          (xsubstitute_servers
+          (substitute_servers
            . ,(list->vector
                (map (match-lambda
                       ((build-server-id . data)