diff --git a/gas/ChangeLog b/gas/ChangeLog
index c48a408ea3b..10a72d2d707 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2016-02-03  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* NEWS: Mention new command line option -mfence-as-lock-add=yes
+	for x86 target.
+
 2016-02-03  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* NEWS: Remove duplicated marker for 2.26.
diff --git a/gas/NEWS b/gas/NEWS
index feec9a6265b..fdcbac43d9c 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,5 +1,8 @@
 -*- text -*-
 
+* New command line option -mfence-as-lock-add=yes for x86 target to encode
+  lfence, mfence and sfence as "lock addl $0x0, (%[re]sp)".
+
 Changes in 2.26:
 
 * Add a configure option --enable-compressed-debug-sections={all,gas} to