diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 915e2f723..431598b2a 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2010-05-26  Catherine Moore  <clm@codesourcery.com>
+
+	* opcode/mips.h (INSN_MIPS16): Remove.
+
 2010-04-21  Joseph Myers  <joseph@codesourcery.com>
 
 	* tic6x-insn-formats.h (s_branch): Correct typo in bitmask.
diff --git a/include/opcode/mips.h b/include/opcode/mips.h
index c2f16d65b..45085bda7 100644
--- a/include/opcode/mips.h
+++ b/include/opcode/mips.h
@@ -555,8 +555,9 @@ static const unsigned int mips_isa_table[] =
 /* DSP ASE */ 
 #define INSN_DSP                  0x00001000
 #define INSN_DSP64                0x00002000
-/* MIPS 16 ASE */
-#define INSN_MIPS16               0x00004000
+
+/* 0x00004000 is unused.  */
+
 /* MIPS-3D ASE */
 #define INSN_MIPS3D               0x00008000