diff --git a/ruby-1.8.6.230-p257.patch b/ruby-1.8.6.230-p257.patch
new file mode 100644
index 0000000..dbae14a
--- /dev/null
+++ b/ruby-1.8.6.230-p257.patch
@@ -0,0 +1,12 @@
+diff -pruN ruby-1.8.6-p230.orig/array.c ruby-1.8.6-p230/array.c
+--- ruby-1.8.6-p230.orig/array.c	2008-07-01 16:32:12.000000000 +0900
++++ ruby-1.8.6-p230/array.c	2008-07-01 16:34:01.000000000 +0900
+@@ -2272,7 +2272,7 @@ rb_ary_fill(argc, argv, ary)
+ 	break;
+     }
+     rb_ary_modify(ary);
+-    if (len > ARY_MAX_SIZE - beg) {
++    if (beg >= ARY_MAX_SIZE || len > ARY_MAX_SIZE - beg) {
+ 	rb_raise(rb_eArgError, "argument too big");
+     }
+     end = beg + len;