diff --git a/ChangeLog b/ChangeLog
index b4951e39bb..714865ecf9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov  4 08:57:37 2014  Eric Wong  <e@80x24.org>
+
+	* encoding.c (enc_memsize): remove unnecessary function
+	  [ruby-core:65304]
+
 Mon Nov  3 18:09:39 2014  Tanaka Akira  <akr@fsij.org>
 
 	* test/openssl/utils.rb: The default of :ignore_listener_error is
diff --git a/encoding.c b/encoding.c
index e3a0978253..a7301a1b2c 100644
--- a/encoding.c
+++ b/encoding.c
@@ -71,15 +71,9 @@ void rb_enc_init(void);
 
 static int load_encoding(const char *name);
 
-static size_t
-enc_memsize(const void *p)
-{
-    return 0;
-}
-
 static const rb_data_type_t encoding_data_type = {
     "encoding",
-    {0, 0, enc_memsize,},
+    {0, 0, 0,},
     NULL, NULL, RUBY_TYPED_FREE_IMMEDIATELY
 };