1 files changed, 2 insertions, 4 deletions
diff --git a/test/driver.c b/test/driver.c
index 296386060..2af1680f4 100644
--- a/test/driver.c
+++ b/test/driver.c
@@ -61,14 +61,12 @@ eval_test(mrb_state *mrb)
 static void
 t_printstr(mrb_state *mrb, mrb_value obj)
 {
-  struct RString *str;
   char *s;
   int len;
    
   if (mrb_string_p(obj)) {
-    str = mrb_str_ptr(obj);
-    s = str->as.heap.ptr;
-    len = str->as.heap.len;
+    s = RSTRING_PTR(obj);
+    len = RSTRING_LEN(obj);
     fwrite(s, len, 1, stdout);
   }
 }