1 files changed, 1 insertions, 1 deletions
diff --git a/insns.def b/insns.def
index 7942804b6c..7ef4c4c1fe 100644
--- a/insns.def
+++ b/insns.def
@@ -2154,7 +2154,7 @@ opt_regexpmatch2
 (VALUE obj2, VALUE obj1)
 (VALUE val)
 {
-    if (RB_TYPE_P(obj2, T_STRING) &&
+    if (CLASS_OF(obj2) == rb_cString &&
 	BASIC_OP_UNREDEFINED_P(BOP_MATCH, STRING_REDEFINED_OP_FLAG)) {
 	val = rb_reg_match(obj1, obj2);
     }