diff --git a/ChangeLog.txt b/ChangeLog.txt
index 28aca8a..3b6d05b 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -39,6 +39,15 @@
 [10] Fixed a bug in the build system that was causing the Windows version of
 wrjpgcom to be built using the rdjpgcom code.
 
+[11] Fixed an issue in the accelerated Huffman decoder that could have caused
+the decoder to read past the end of the input buffer when a malformed,
+specially-crafted JPEG image was being decompressed.  In prior versions of
+libjpeg-turbo, the accelerated Huffman decoder was invoked (in most cases) only
+if there were > 128 bytes of data in the input buffer.  However, it is possible
+to construct a JPEG image in which a single Huffman block is over 430 bytes
+long, so this version of libjpeg-turbo activates the accelerated Huffman
+decoder only if there are > 512 bytes of data in the input buffer.
+
 
 1.2.1
 =====
diff --git a/jdhuff.c b/jdhuff.c
index 4197cc5..59b065a 100644
--- a/jdhuff.c
+++ b/jdhuff.c
@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1991-1997, Thomas G. Lane.
  * Modifications:
- * Copyright (C) 2009-2011, D. R. Commander.
+ * Copyright (C) 2009-2011, 2016, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README file.
  *
  * This file contains Huffman entropy decoding routines.
@@ -743,7 +743,7 @@
  * this module, since we'll just re-assign them on the next call.)
  */
 
-#define BUFSIZE (DCTSIZE2 * 2)
+#define BUFSIZE (DCTSIZE2 * 8)
 
 METHODDEF(boolean)
 decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)