diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index f9c490f..ed82702 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -76,7 +76,7 @@
 
 (define c-utf8->string
   (lambda (c-bytevector)
-    #;(when (c-null? c-bytevector)
+    (when (c-null? c-bytevector)
       (error "Can not turn null pointer into string"))
     (let ((size (c-strlen c-bytevector)))
       (utf8->string (c-bytevector->bytevector c-bytevector size)))))