diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index c6c3d1e..cbe8d78 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -107,7 +107,7 @@
   (stklos (define c-null?
             (lambda (pointer)
               (cond ((void? pointer) #t)
-                    ((and (c-bytevector? pointer)
+                    ((and ;(c-bytevector? pointer)
                           (= (c-memset-pointer->address pointer 0 0) 0)) #t)
                     (else #f)))))
   (else (define c-null?