diff --git a/expander.rkt b/expander.rkt
index df5ea50..a1ae13b 100644
--- a/expander.rkt
+++ b/expander.rkt
@@ -1,4 +1,7 @@
 #lang br/quicklang
+(namespace-require 'racket/base) ; must be added for the currect namespace
+
+
 (define paperwidth #f)
 (define paperheight #f)
 (define (set x y) (set! x y))
@@ -27,9 +30,7 @@
     [(u-sexp REQ OPT ...)
      #'(let ([head REQ]
              (namespace (current-namespace)))
-        (begin
-          (println (namespace-mapped-symbols namespace))
-       ((namespace-variable-value head namespace)  OPT ...)))]
+       (namespace-variable-value head namespace)  OPT ...)]
   )
 
 (define-macro (u-module-begin (u-program LINE ...))