diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index dda7ada62..60c9bb7de 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2011-02-28  Maciej W. Rozycki  <macro@codesourcery.com>
+
+	* mips.h (M_PREF_AB): New enum value.
+
 2011-02-12  Mike Frysinger  <vapier@gentoo.org>
 
 	* bfin.h (M_S2RND, M_T, M_W32, M_FU, M_TFU, M_IS, M_ISS2, M_IH,
diff --git a/include/opcode/mips.h b/include/opcode/mips.h
index 282349c49..0685baba0 100644
--- a/include/opcode/mips.h
+++ b/include/opcode/mips.h
@@ -864,6 +864,7 @@ enum
   M_MULOU_I,
   M_NOR_I,
   M_OR_I,
+  M_PREF_AB,
   M_REM_3,
   M_REM_3I,
   M_REMU_3,