diff --git a/ChangeLog b/ChangeLog
index d35148817c..19a559465b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Mar 15 13:41:22 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* internal.h (rb_gc_mark_global_tbl): should be private,
+	  but was accidentally exported.
+
 Tue Mar 15 12:51:06 2016  Marcus Stollsteimer  <sto.mar@web.de>
 
 	* doc/extension.ja.rdoc: Fix RDoc markup in doc/extension*.rdoc.
diff --git a/internal.h b/internal.h
index 76746cc3b7..222a8ba8dc 100644
--- a/internal.h
+++ b/internal.h
@@ -1285,6 +1285,7 @@ char *ruby_hdtoa(double d, const char *xdigs, int ndigits, int *decpt, int *sign
 extern rb_encoding OnigEncodingUTF_8;
 
 /* variable.c */
+void rb_gc_mark_global_tbl(void);
 size_t rb_generic_ivar_memsize(VALUE);
 VALUE rb_search_class_path(VALUE);
 VALUE rb_attr_delete(VALUE, ID);
@@ -1436,7 +1437,6 @@ extern const char ruby_hexdigits[];
 extern unsigned long ruby_scan_digits(const char *str, ssize_t len, int base, size_t *retlen, int *overflow);
 
 /* variable.c (export) */
-void rb_gc_mark_global_tbl(void);
 void rb_mark_generic_ivar(VALUE);
 VALUE rb_const_missing(VALUE klass, VALUE name);
 int rb_class_ivar_set(VALUE klass, ID vid, VALUE value);