1 files changed, 2 insertions, 2 deletions
diff --git a/enum.c b/enum.c
index 70267a07dd..ea101ba481 100644
--- a/enum.c
+++ b/enum.c
@@ -2483,8 +2483,8 @@ enum_zip(int argc, VALUE *argv, VALUE obj)
 	CONST_ID(conv, "to_enum");
 	for (i=0; i<argc; i++) {
 	    if (!rb_respond_to(argv[i], id_each)) {
-                rb_raise(rb_eTypeError, "wrong argument type %s (must respond to :each)",
-                    rb_obj_classname(argv[i]));
+		rb_raise(rb_eTypeError, "wrong argument type %"PRIsVALUE" (must respond to :each)",
+			 rb_obj_class(argv[i]));
             }
 	    argv[i] = rb_funcall(argv[i], conv, 1, ID2SYM(id_each));
 	}