diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index f99bb55..29f9f23 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -102,6 +102,7 @@
   (kawa #t) ; FIXME
   (chibi #t)
   (gauche (define c-null? pointer-null?))
+  (mosh (define c-null? pointer-null?))
   (else (define c-null?
           (lambda (pointer)
             (if (c-bytevector? pointer)