diff --git a/ChangeLog b/ChangeLog
index b4fa136b09..d615081c36 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Thu Mar 12 05:19:22 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Thu Mar 12 05:22:50 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (copy_stream_fallback_body): off_t may be larger than long.
 
 	* iseq.c (rb_iseq_disasm): RSTRING_LEN() returns long.
 
diff --git a/io.c b/io.c
index 654669abc9..4f50a5dc8c 100644
--- a/io.c
+++ b/io.c
@@ -5448,7 +5448,7 @@ rb_io_reopen(int argc, VALUE *argv, VALUE file)
         if (close(fptr->fd) < 0)
             rb_sys_fail_path(fptr->pathv);
         fptr->fd = -1;
-       fptr->fd = rb_sysopen(fptr->pathv, oflags, 0666);
+        fptr->fd = rb_sysopen(fptr->pathv, oflags, 0666);
     }
 
     return file;
@@ -7726,7 +7726,7 @@ copy_stream_fallback_body(VALUE arg)
     const int buflen = 16*1024;
     VALUE n;
     VALUE buf = rb_str_buf_new(buflen);
-    long rest = stp->copy_length;
+    off_t rest = stp->copy_length;
     off_t off = stp->src_offset;
     ID read_method = id_readpartial;
 
@@ -7745,7 +7745,7 @@ copy_stream_fallback_body(VALUE arg)
         else {
             if (rest == 0)
                 break;
-            l = buflen < rest ? buflen : rest;
+            l = buflen < rest ? buflen : (long)rest;
         }
         if (stp->src_fd == -1) {
             rb_funcall(stp->src, read_method, 2, INT2FIX(l), buf);