diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index 5a591cf..ff7d710 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -107,7 +107,7 @@
               (display "HERE c-null?: ")
               (write pointer)
               (newline)
-              (and (pointer? c-bytevector?)
+              (and (c-bytevector? c-bytevector?)
                    (cpointer-null? pointer)))))
   (else (define c-null?
           (lambda (pointer)