diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index 13a1671..3787f9b 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -102,7 +102,7 @@
   (chibi #t)
   (else (define c-null?
           (lambda (pointer)
-            (display "HERE: ")
+            (display "HERE123: ")
             (write pointer)
             (newline)
             (if (c-bytevector? pointer)