diff --git a/ChangeLog b/ChangeLog
index 37c2c407d3..3fd413d3e3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Sun Aug 31 17:16:07 2008  Tanaka Akira  <akr@fsij.org>
+
+	* transcode.c (make_econv_exception): rename instance variable names
+	  for storing encoding names.
+	  (ecerr_source_encoding_name): method renamed.
+	  (ecerr_destination_encoding_name): ditto.
+
 Sun Aug 31 16:57:36 2008  Tanaka Akira  <akr@fsij.org>
 
 	* transcode.c (econv_putback): associate encoding to the result.
diff --git a/test/ruby/test_econv.rb b/test/ruby/test_econv.rb
index fd7bed5652..c18d7a8e65 100644
--- a/test/ruby/test_econv.rb
+++ b/test/ruby/test_econv.rb
@@ -455,8 +455,8 @@ class TestEncodingConverter < Test::Unit::TestCase
     err = assert_raise(Encoding::InvalidByteSequence) {
       "abc\xa4def".encode("ISO-8859-1", "EUC-JP")
     }
-    assert_equal("EUC-JP", err.source_encoding)
-    assert_equal("UTF-8", err.destination_encoding)
+    assert_equal("EUC-JP", err.source_encoding_name)
+    assert_equal("UTF-8", err.destination_encoding_name)
     assert_equal("\xA4".force_encoding("ASCII-8BIT"), err.error_bytes)
     assert_equal("d", err.readagain_bytes)
     assert_equal(false, err.incomplete_input?)
@@ -466,8 +466,8 @@ class TestEncodingConverter < Test::Unit::TestCase
     err = assert_raise(Encoding::InvalidByteSequence) {
       "abc\xa4".encode("ISO-8859-1", "EUC-JP")
     }
-    assert_equal("EUC-JP", err.source_encoding)
-    assert_equal("UTF-8", err.destination_encoding)
+    assert_equal("EUC-JP", err.source_encoding_name)
+    assert_equal("UTF-8", err.destination_encoding_name)
     assert_equal("\xA4".force_encoding("ASCII-8BIT"), err.error_bytes)
     assert_equal(nil, err.readagain_bytes)
     assert_equal(true, err.incomplete_input?)
@@ -477,8 +477,8 @@ class TestEncodingConverter < Test::Unit::TestCase
     err = assert_raise(Encoding::ConversionUndefined) {
       "abc\xa4\xa2def".encode("ISO-8859-1", "EUC-JP")
     }
-    assert_equal("UTF-8", err.source_encoding)
-    assert_equal("ISO-8859-1", err.destination_encoding)
+    assert_equal("UTF-8", err.source_encoding_name)
+    assert_equal("ISO-8859-1", err.destination_encoding_name)
     assert_equal("\u{3042}", err.error_char)
   end
 
diff --git a/transcode.c b/transcode.c
index 2afed2c770..a036c8f807 100644
--- a/transcode.c
+++ b/transcode.c
@@ -1667,8 +1667,8 @@ make_econv_exception(rb_econv_t *ec)
         }
 
         exc = rb_exc_new3(rb_eInvalidByteSequence, mesg);
-        rb_ivar_set(exc, rb_intern("source_encoding"), rb_str_new2(ec->last_error.source_encoding));
-        rb_ivar_set(exc, rb_intern("destination_encoding"), rb_str_new2(ec->last_error.destination_encoding));
+        rb_ivar_set(exc, rb_intern("source_encoding_name"), rb_str_new2(ec->last_error.source_encoding));
+        rb_ivar_set(exc, rb_intern("destination_encoding_name"), rb_str_new2(ec->last_error.destination_encoding));
         rb_ivar_set(exc, rb_intern("error_bytes"), bytes);
         rb_ivar_set(exc, rb_intern("readagain_bytes"), bytes2);
         rb_ivar_set(exc, rb_intern("incomplete_input"), ec->last_error.result == econv_incomplete_input ? Qtrue : Qfalse);
@@ -1686,8 +1686,8 @@ make_econv_exception(rb_econv_t *ec)
                 ec->last_error.destination_encoding);
         exc = rb_exc_new3(rb_eConversionUndefined, mesg);
         idx = rb_enc_find_index(ec->last_error.source_encoding);
-        rb_ivar_set(exc, rb_intern("source_encoding"), rb_str_new2(ec->last_error.source_encoding));
-        rb_ivar_set(exc, rb_intern("destination_encoding"), rb_str_new2(ec->last_error.destination_encoding));
+        rb_ivar_set(exc, rb_intern("source_encoding_name"), rb_str_new2(ec->last_error.source_encoding));
+        rb_ivar_set(exc, rb_intern("destination_encoding_name"), rb_str_new2(ec->last_error.destination_encoding));
         idx = rb_enc_find_index(ec->last_error.source_encoding);
         if (0 <= idx)
             rb_enc_associate_index(bytes, idx);
@@ -2849,15 +2849,15 @@ rb_econv_check_error(rb_econv_t *ec)
 }
 
 static VALUE
-ecerr_source_encoding(VALUE self)
+ecerr_source_encoding_name(VALUE self)
 {
-    return rb_attr_get(self, rb_intern("source_encoding"));
+    return rb_attr_get(self, rb_intern("source_encoding_name"));
 }
 
 static VALUE
-ecerr_destination_encoding(VALUE self)
+ecerr_destination_encoding_name(VALUE self)
 {
-    return rb_attr_get(self, rb_intern("destination_encoding"));
+    return rb_attr_get(self, rb_intern("destination_encoding_name"));
 }
 
 static VALUE
@@ -2936,12 +2936,12 @@ Init_transcode(void)
     rb_define_const(rb_cEncodingConverter, "CRLF_NEWLINE_ENCODER", INT2FIX(ECONV_CRLF_NEWLINE_ENCODER));
     rb_define_const(rb_cEncodingConverter, "CR_NEWLINE_ENCODER", INT2FIX(ECONV_CR_NEWLINE_ENCODER));
 
-    rb_define_method(rb_eConversionUndefined, "source_encoding", ecerr_source_encoding, 0);
-    rb_define_method(rb_eConversionUndefined, "destination_encoding", ecerr_destination_encoding, 0);
+    rb_define_method(rb_eConversionUndefined, "source_encoding_name", ecerr_source_encoding_name, 0);
+    rb_define_method(rb_eConversionUndefined, "destination_encoding_name", ecerr_destination_encoding_name, 0);
     rb_define_method(rb_eConversionUndefined, "error_char", ecerr_error_char, 0);
 
-    rb_define_method(rb_eInvalidByteSequence, "source_encoding", ecerr_source_encoding, 0);
-    rb_define_method(rb_eInvalidByteSequence, "destination_encoding", ecerr_destination_encoding, 0);
+    rb_define_method(rb_eInvalidByteSequence, "source_encoding_name", ecerr_source_encoding_name, 0);
+    rb_define_method(rb_eInvalidByteSequence, "destination_encoding_name", ecerr_destination_encoding_name, 0);
     rb_define_method(rb_eInvalidByteSequence, "error_bytes", ecerr_error_bytes, 0);
     rb_define_method(rb_eInvalidByteSequence, "readagain_bytes", ecerr_readagain_bytes, 0);
     rb_define_method(rb_eInvalidByteSequence, "incomplete_input?", ecerr_incomplete_input, 0);