diff --git a/ChangeLog b/ChangeLog
index 3b7ca70394..e62908ab03 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Sep  1 02:48:28 2008  Tanaka Akira  <akr@fsij.org>
+
+	* tool/transcode-tblgen.rb: change "illegal" to "invalid".
+
 Mon Sep  1 02:31:16 2008  Tanaka Akira  <akr@fsij.org>
 
 	* tool/transcode-tblgen.rb (transcode_generated_code): defined for
diff --git a/tool/transcode-tblgen.rb b/tool/transcode-tblgen.rb
index 44be6a9d96..70eb360914 100644
--- a/tool/transcode-tblgen.rb
+++ b/tool/transcode-tblgen.rb
@@ -405,21 +405,21 @@ def citrus_mskanji_cstomb(csid, index)
     index + 0x80
   when 2, 3
     row = index >> 8
-    raise "illegal byte sequence" if row < 0x21
+    raise "invalid byte sequence" if row < 0x21
     if csid == 3
       if row <= 0x2F
         offset = (row == 0x22 || row >= 0x26) ? 0xED : 0xF0
       elsif row >= 0x4D && row <= 0x7E
         offset = 0xCE
       else
-        raise "illegal byte sequence"
+        raise "invalid byte sequence"
       end
     else
-      raise "illegal byte sequence" if row > 0x97
+      raise "invalid byte sequence" if row > 0x97
       offset = (row < 0x5F) ? 0x81 : 0xC1
     end
     col = index & 0xFF
-    raise "illegal byte sequence" if (col < 0x21 || col > 0x7E)
+    raise "invalid byte sequence" if (col < 0x21 || col > 0x7E)
 
     row -= 0x21
     col -= 0x21