diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index 32e0e34..64cd0fd 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -102,7 +102,10 @@
   (kawa #t) ; FIXME
   (chibi #t)
   (gauche (define c-null? pointer-null?))
-  (stklos (define c-null? cpointer-null?))
+  (stklos (define c-null?
+            (lambda (pointer)
+              (and pointer
+                   cpointer-null?))))
   (else (define c-null?
           (lambda (pointer)
             (if (c-bytevector? pointer)