diff --git a/ChangeLog b/ChangeLog
index 85937fb830..126ca60ad9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Nov  9 22:54:30 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_sysopen): max fd is updated in rb_sysopen_internal()
+	  already.
+
 Wed Nov  9 22:13:38 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* test/ruby/test_file.rb (TestFile#test_utime_with_minus_time_segv):
diff --git a/io.c b/io.c
index a2b96bad6b..0ffeb85942 100644
--- a/io.c
+++ b/io.c
@@ -4792,7 +4792,6 @@ rb_sysopen(VALUE fname, int oflags, mode_t perm)
 	    rb_sys_fail(RSTRING_PTR(fname));
 	}
     }
-    rb_update_max_fd(fd);
     return fd;
 }