diff --git a/libguile/programs.c b/libguile/programs.c
index ac35e3c10..8ce9fe147 100644
--- a/libguile/programs.c
+++ b/libguile/programs.c
@@ -83,13 +83,13 @@ scm_i_program_print (SCM program, SCM port, scm_print_state *pstate)
     {
       /* twingliness */
       scm_puts ("#<continuation ", port);
-      scm_uintprint (SCM_CELL_WORD_1 (program), 16, port);
+      scm_uintprint (SCM_UNPACK (program), 16, port);
       scm_putc ('>', port);
     }
   else if (scm_is_false (write_program) || print_error)
     {
       scm_puts ("#<program ", port);
-      scm_uintprint (SCM_CELL_WORD_1 (program), 16, port);
+      scm_uintprint (SCM_UNPACK (program), 16, port);
       scm_putc ('>', port);
     }
   else