diff --git a/guix-data-service/web/server.scm b/guix-data-service/web/server.scm
index 3719b9c..b1075a0 100644
--- a/guix-data-service/web/server.scm
+++ b/guix-data-service/web/server.scm
@@ -387,7 +387,7 @@ port. Also, the port used can be changed by passing the --port option.\n"
                            (format
                             (current-error-port)
                             "warning: ~a took ~f seconds to complete\n"
-                            (uri-path (request-uri request))
+                            (uri->string (request-uri request))
                             request-duration))))
                      #:host host
                      #:port port)))