diff --git a/foreign/c/pointer.scm b/foreign/c/pointer.scm
index 92434e6..2bb1c98 100644
--- a/foreign/c/pointer.scm
+++ b/foreign/c/pointer.scm
@@ -76,6 +76,8 @@
 
 (define c-utf8->string
   (lambda (c-bytevector)
+    (display c-bytevector)
+    (newline)
     (when (c-null? c-bytevector)
       (error "Can not turn null pointer into string" c-bytevector))
     (let ((size (c-strlen c-bytevector)))