diff --git a/ChangeLog b/ChangeLog
index a83c3ecf15..2fd840bdad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jan  8 15:54:02 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
+
+	* eval.c (rb_add_method): clear replaced method from the cache.
+
 Mon Jan  7 12:38:47 2002  Tanaka Akira  <akr@m17n.org>
 
 	* lib/time.rb (Time#xmlschema): new optional argument
diff --git a/eval.c b/eval.c
index d791b31f86..f5fbd5c91b 100644
--- a/eval.c
+++ b/eval.c
@@ -229,7 +229,8 @@ rb_add_method(klass, mid, node, noex)
     }
     if (OBJ_FROZEN(klass)) rb_error_frozen("class/module");
     body = NEW_METHOD(node, noex);
-    st_insert(RCLASS(klass)->m_tbl, mid, body);
+    if (st_insert(RCLASS(klass)->m_tbl, mid, body))
+	rb_clear_cache_by_id(mid);
 }
 
 static NODE*
diff --git a/version.h b/version.h
index 73262c0c6a..185c6b2cab 100644
--- a/version.h
+++ b/version.h
@@ -1,4 +1,4 @@
 #define RUBY_VERSION "1.7.2"
-#define RUBY_RELEASE_DATE "2002-01-07"
+#define RUBY_RELEASE_DATE "2002-01-08"
 #define RUBY_VERSION_CODE 172
-#define RUBY_RELEASE_CODE 20020107
+#define RUBY_RELEASE_CODE 20020108