diff --git a/ChangeLog b/ChangeLog
index 64a20e3b23..950761a83e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Sep  5 03:09:48 2008  Koichi Sasada  <ko1@atdot.net>
+
+	* iseq.c (iseq_data_to_ary): make it static.
+
+	* thread.c (thgroup_enclose): ditto.
+
 Fri Sep  5 02:56:37 2008  Koichi Sasada  <ko1@atdot.net>
 
 	* vm.c (thread_recycle_stack_slot, thread_recycle_stack_count): 
diff --git a/iseq.c b/iseq.c
index b9641763da..34d90871d7 100644
--- a/iseq.c
+++ b/iseq.c
@@ -559,6 +559,7 @@ iseq_inspect(VALUE self)
 		      RSTRING_PTR(iseq->name), RSTRING_PTR(iseq->filename));
 }
 
+static
 VALUE iseq_data_to_ary(rb_iseq_t *iseq);
 
 static VALUE
@@ -980,7 +981,7 @@ cdhash_each(VALUE key, VALUE value, VALUE ary)
     return ST_CONTINUE;
 }
 
-VALUE
+static VALUE
 iseq_data_to_ary(rb_iseq_t *iseq)
 {
     int i, pos, line = 0;
diff --git a/thread.c b/thread.c
index ae0daa5d50..2f02cc3ca0 100644
--- a/thread.c
+++ b/thread.c
@@ -2464,7 +2464,7 @@ thgroup_list(VALUE group)
  *     ThreadError: can't move from the enclosed thread group
  */
 
-VALUE
+static VALUE
 thgroup_enclose(VALUE group)
 {
     struct thgroup *data;