diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 3cd0c8df7b..523ac71f42 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -4129,10 +4129,10 @@ static VALUE
 vm_opt_aref(VALUE recv, VALUE obj)
 {
     if (SPECIAL_CONST_P(recv)) {
-	if (FIXNUM_P(recv) && FIXNUM_P(obj) &&
-		BASIC_OP_UNREDEFINED_P(BOP_AREF, INTEGER_REDEFINED_OP_FLAG)) {
-	    return rb_fix_aref(recv, obj);
-	}
+        if (FIXNUM_P(recv) && FIXNUM_P(obj) &&
+                BASIC_OP_UNREDEFINED_P(BOP_AREF, INTEGER_REDEFINED_OP_FLAG)) {
+            return rb_fix_aref(recv, obj);
+        }
 	return Qundef;
     }
     else if (RBASIC_CLASS(recv) == rb_cArray &&