diff --git a/ChangeLog b/ChangeLog
index 246bb08b19..14cb84b104 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,13 @@
+Fri Dec  4 19:52:52 2015  Martin Duerst  <duerst@it.aoyama.ac.jp>
+
+	* enc/iso_8859_13.c: Added three missing lower/upper-case
+	  character pairs (from Kimihito Matsui)
+
 Fri Dec  4 18:57:57 2015  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* enc/iso_8859_4.c: Added missing lower/upper-case character
 	  pair (U+014A and U+014B, LATIN CAPITAL/SMALL LETTER ENG)
+	  (from Kimihito Matsui)
 
 Fri Dec  4 16:48:19 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
diff --git a/enc/iso_8859_13.c b/enc/iso_8859_13.c
index 11b3dda1c9..5607013c80 100644
--- a/enc/iso_8859_13.c
+++ b/enc/iso_8859_13.c
@@ -158,6 +158,10 @@ is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSE
 }
 
 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
+ { 0xa8, 0xb8 },
+ { 0xaa, 0xba },
+ { 0xaf, 0xbf },
+ 
  { 0xc0, 0xe0 },
  { 0xc1, 0xe1 },
  { 0xc2, 0xe2 },