diff --git a/ChangeLog b/ChangeLog
index 31e10903cc..52ad98ad7c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon Sep  8 02:04:25 2008  Tanaka Akira  <akr@fsij.org>
+
+	* include/ruby/encoding.h (rb_econv_set_replacement): renamed from
+	  rb_econv_set_replacemenet.
+
+	* transcode.c: follow the renaming.
+
 Mon Sep  8 01:10:41 2008  Tanaka Akira  <akr@fsij.org>
 
 	* tool/transcode-tblgen.rb (transcode_tblgen): log message refined.
diff --git a/include/ruby/encoding.h b/include/ruby/encoding.h
index eac7326a6d..0519340c1f 100644
--- a/include/ruby/encoding.h
+++ b/include/ruby/encoding.h
@@ -222,7 +222,7 @@ rb_econv_result_t rb_econv_convert(rb_econv_t *ec,
 void rb_econv_close(rb_econv_t *ec);
 
 /* result: 0:success -1:failure */
-int rb_econv_set_replacemenet(rb_econv_t *ec, const unsigned char *str, size_t len, const char *encname);
+int rb_econv_set_replacement(rb_econv_t *ec, const unsigned char *str, size_t len, const char *encname);
 
 VALUE rb_econv_open_exc(const char *senc, const char *denc, int ecflags);
 
diff --git a/transcode.c b/transcode.c
index cd7be00e12..49e8ed3856 100644
--- a/transcode.c
+++ b/transcode.c
@@ -1980,7 +1980,7 @@ make_replacement(rb_econv_t *ec)
 }
 
 int
-rb_econv_set_replacemenet(rb_econv_t *ec,
+rb_econv_set_replacement(rb_econv_t *ec,
     const unsigned char *str, size_t len, const char *encname)
 {
     unsigned char *str2;
@@ -2260,7 +2260,7 @@ rb_econv_open_opts(const char *source_encoding, const char *destination_encoding
         int ret;
         rb_encoding *enc = rb_enc_get(replacement);
 
-        ret = rb_econv_set_replacemenet(ec,
+        ret = rb_econv_set_replacement(ec,
                 (const unsigned char *)RSTRING_PTR(replacement),
                 RSTRING_LEN(replacement),
                 enc->name);
@@ -3357,7 +3357,7 @@ econv_set_replacement(VALUE self, VALUE arg)
     StringValue(string);
     enc = rb_enc_get(string);
 
-    ret = rb_econv_set_replacemenet(ec,
+    ret = rb_econv_set_replacement(ec,
             (const unsigned char *)RSTRING_PTR(string),
             RSTRING_LEN(string),
             enc->name);