diff --git a/ChangeLog b/ChangeLog
index 991997e454..88f42bdd17 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Dec  5 06:03:54 2015  Eric Wong  <e@80x24.org>
+
+	* vm.c (ruby_vm_verbose_ptr): make static
+	  (ruby_vm_debug_ptr): ditto
+
 Sat Dec  5 00:56:29 2015  Naohisa Goto  <ngotogenome@gmail.com>
 
 	* include/ruby/ruby.h (RB_OBJ_TAINT): follow-up of r52881.
diff --git a/vm.c b/vm.c
index de8be50e72..71e9eacaf1 100644
--- a/vm.c
+++ b/vm.c
@@ -2989,13 +2989,13 @@ Init_top_self(void)
     rb_define_alias(rb_singleton_class(rb_vm_top_self()), "inspect", "to_s");
 }
 
-VALUE *
+static VALUE *
 ruby_vm_verbose_ptr(rb_vm_t *vm)
 {
     return &vm->verbose;
 }
 
-VALUE *
+static VALUE *
 ruby_vm_debug_ptr(rb_vm_t *vm)
 {
     return &vm->debug;