1 files changed, 1 insertions, 1 deletions
diff --git a/parse.y b/parse.y
index ab17534b36..437f534f1d 100644
--- a/parse.y
+++ b/parse.y
@@ -5152,7 +5152,7 @@ debug_lines(const char *f)
     CONST_ID(script_lines, "SCRIPT_LINES__");
     if (rb_const_defined_at(rb_cObject, script_lines)) {
 	VALUE hash = rb_const_get_at(rb_cObject, script_lines);
-	if (TYPE(hash) == T_HASH) {
+	if (RB_TYPE_P(hash, T_HASH)) {
 	    VALUE fname = rb_str_new2(f);
 	    VALUE lines = rb_ary_new();
 	    rb_hash_aset(hash, fname, lines);