diff --git a/ChangeLog b/ChangeLog
index 71a9f993bd..9510468f10 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Sep  2 12:00:32 2006  NAKAMURA, Hiroshi  <nahi@ruby-lang.org>
+
+	* lib/csv.rb (CSV::IOReader#initialize): use String#[](pos, len)
+	  instead of String#[](idx) to check utf BOM.  follows String#[](idx)
+	  behavior change of 1.9.
+
 Fri Sep  1 22:07:04 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* ruby.h (RSTRING_EMBED_LEN_MASK): uses 5 bits to support 64bit
diff --git a/lib/csv.rb b/lib/csv.rb
index 0f6907be57..536ed8af58 100644
--- a/lib/csv.rb
+++ b/lib/csv.rb
@@ -599,7 +599,7 @@ class CSV
       @rs = rs
       @dev = CSV::IOBuf.new(@io)
       @idx = 0
-      if @dev[0] == 0xef and @dev[1] == 0xbb and @dev[2] == 0xbf
+      if @dev[0, 3] == "\xef\xbb\xbf"
         @idx += 3
       end
       @close_on_terminate = false