diff --git a/ChangeLog b/ChangeLog
index d178cf0b5e..fa386a4dd9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Fri Feb 16 21:34:33 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* object.c (rb_obj_ivar_set/get/defined): fix to check :@_v/C id.
+
+	* test/testunit/test_testcase.rb: fix to use instance_variable_get()
+	  to access @_result.
+
 Fri Feb 16 20:59:10 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* intern.h: add a prototype of rb_sym_to_s().
diff --git a/object.c b/object.c
index aa5e6b73fb..f0138d6c29 100644
--- a/object.c
+++ b/object.c
@@ -1673,13 +1673,13 @@ rb_obj_public_methods(int argc, VALUE *argv, VALUE obj)
  *     fred.instance_variable_get(:@a)    #=> "cat"
  *     fred.instance_variable_get("@b")   #=> 99
  */
-
+#include "debug.h"
 static VALUE
 rb_obj_ivar_get(VALUE obj, VALUE iv)
 {
     ID id = rb_to_id(iv);
 
-    if (!rb_is_instance_id(id)) {
+    if (!rb_is_instance_id(id) && !rb_is_instance2_id(id)) {
 	rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id));
     }
     return rb_ivar_get(obj, id);
@@ -1710,7 +1710,7 @@ rb_obj_ivar_set(VALUE obj, VALUE iv, VALUE val)
 {
     ID id = rb_to_id(iv);
 
-    if (!rb_is_instance_id(id)) {
+    if (!rb_is_instance_id(id) && !rb_is_instance2_id(id)) {
 	rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id));
     }
     return rb_ivar_set(obj, id, val);
@@ -1739,7 +1739,7 @@ rb_obj_ivar_defined(VALUE obj, VALUE iv)
 {
     ID id = rb_to_id(iv);
 
-    if (!rb_is_instance_id(id)) {
+    if (!rb_is_instance_id(id) && !rb_is_instance2_id(id)) {
 	rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id));
     }
     return rb_ivar_defined(obj, id);
diff --git a/test/testunit/test_testcase.rb b/test/testunit/test_testcase.rb
index 2934a92fef..4eaac2f3f2 100644
--- a/test/testunit/test_testcase.rb
+++ b/test/testunit/test_testcase.rb
@@ -265,7 +265,7 @@ module Test
       end
       
       def check(message, passed)
-        @_result.add_assertion
+        instance_variable_get(:@_result/TestCase).add_assertion
         if ! passed
           raise AssertionFailedError.new(message)
         end