diff --git a/ChangeLog b/ChangeLog
index 8d9203e5a1..f12f84a26d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jul 22 14:30:17 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* include/ruby/missing.h: add prototype for ruby_close().
+
 Thu Jul 22 12:58:12 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in (RUBY_EXTERN): ignore invalid attribute.
diff --git a/include/ruby/missing.h b/include/ruby/missing.h
index f4a5556ddf..1e0474cef8 100644
--- a/include/ruby/missing.h
+++ b/include/ruby/missing.h
@@ -173,6 +173,15 @@ RUBY_EXTERN int signbit(double x);
 RUBY_EXTERN int ffs(int);
 #endif
 
+#ifndef HAVE_CLOSE
+#include <sys/types.h>
+#include <sys/socket.h>
+RUBY_EXTERN int ruby_getpeername(int, struct sockaddr *, socklen_t *);
+RUBY_EXTERN int ruby_getsockname(int, struct sockaddr *, socklen_t *);
+RUBY_EXTERN int ruby_shutdown(int, int);
+RUBY_EXTERN int ruby_close(int);
+#endif
+
 #if defined __GNUC__ && __GNUC__ >= 4
 #pragma GCC visibility pop
 #endif