diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 39cecdef4..549d565ef 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2010-02-25  Wu Zhangjin  <wuzhangjin@gmail.com>
+
+	* mips.h: (LOONGSON2F_NOP_INSN): New macro.
+
 2010-02-08  Philipp Tomsich  <philipp.tomsich@theobroma-systems.com>
 
 	* opcode/ppc.h (PPC_OPCODE_TITAN): Define.
diff --git a/include/opcode/mips.h b/include/opcode/mips.h
index 27d10e61a..d6b3cf497 100644
--- a/include/opcode/mips.h
+++ b/include/opcode/mips.h
@@ -1,6 +1,6 @@
 /* mips.h.  Mips opcode list for GDB, the GNU debugger.
    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
-   2003, 2004, 2005, 2008, 2009
+   2003, 2004, 2005, 2008, 2009, 2010
    Free Software Foundation, Inc.
    Contributed by Ralph Campbell and OSF
    Commented and modified by Ian Lance Taylor, Cygnus Support
@@ -1106,4 +1106,8 @@ extern int bfd_mips_num_opcodes;
 extern const struct mips_opcode mips16_opcodes[];
 extern const int bfd_mips16_num_opcodes;
 
+/* A NOP insn impemented as "or at,at,zero".
+   Used to implement -mfix-loongson2f.  */
+#define LOONGSON2F_NOP_INSN	0x00200825
+
 #endif /* _MIPS_H_ */