diff --git a/ChangeLog b/ChangeLog
index ff42536ada..b08470f48c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Feb 13 15:01:24 2010  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* marshal.c (id2encidx): duplicated entry for encoding name.
+	  [ruby-dev:40388]
+
 Sat Feb 13 12:17:52 2010  Tanaka Akira  <akr@fsij.org>
 
 	* lib/tempfile.rb (Tempfile::Remover): new class to replace
diff --git a/marshal.c b/marshal.c
index e5ede8c659..deb7d2853b 100644
--- a/marshal.c
+++ b/marshal.c
@@ -1130,7 +1130,6 @@ id2encidx(ID id, VALUE val, struct load_arg *arg)
 {
     if (id == rb_id_encoding()) {
 	int idx = rb_enc_find_index(StringValueCStr(val));
-	r_entry(val, arg);
 	return idx;
     }
     else if (id == rb_intern("E")) {