diff --git a/ChangeLog b/ChangeLog
index f1a7c28d95..f49fb60261 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov  1 12:36:16 2011  Tanaka Akira  <akr@fsij.org>
+
+	* internal.h (rb_maygvl_fd_fix_cloexec): change the visibility for
+	  ext/socket.
+
 Tue Nov  1 12:00:53 2011  Tanaka Akira  <akr@fsij.org>
 
 	* io.c (rb_maygvl_fd_fix_cloexec): renamed from fd_set_cloexec.
diff --git a/internal.h b/internal.h
index 16eca49d03..cf3fec20b5 100644
--- a/internal.h
+++ b/internal.h
@@ -102,7 +102,6 @@ const char *ruby_get_inplace_mode(void);
 void ruby_set_inplace_mode(const char *);
 ssize_t rb_io_bufread(VALUE io, void *buf, size_t size);
 void rb_stdio_set_default_encoding(void);
-void rb_maygvl_fd_fix_cloexec(int fd);
 
 /* iseq.c */
 VALUE rb_iseq_compile_with_option(VALUE src, VALUE file, VALUE filepath, VALUE line, VALUE opt);
@@ -229,6 +228,9 @@ VALUE rb_thread_call_without_gvl(
     rb_blocking_function_t *func, void *data1,
     rb_unblock_function_t *ubf, void *data2);
 
+/* io.c */
+void rb_maygvl_fd_fix_cloexec(int fd);
+
 #if defined __GNUC__ && __GNUC__ >= 4
 #pragma GCC visibility pop
 #endif