diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index b95cf1e81..981de9e89 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,8 @@
+2001-08-16  Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
+
+	* mips.h (INSN_10000): Define.
+	(OPCODE_IS_MEMBER): Check for INSN_10000.
+
 2001-08-10  Alan Modra  <amodra@one.net.au>
 
 	* ppc.h: Revert 2001-08-08.
diff --git a/include/opcode/mips.h b/include/opcode/mips.h
index 23e6028c6..349d2668e 100644
--- a/include/opcode/mips.h
+++ b/include/opcode/mips.h
@@ -326,6 +326,8 @@ struct mips_opcode
 #define INSN_4100                 0x00040000
 /* Toshiba R3900 instruction.  */
 #define INSN_3900                 0x00080000
+/* MIPS R10000 instruction.  */
+#define INSN_10000                0x00100000
 
 /* MIPS ISA defines, use instead of hardcoding ISA level.  */
 
@@ -375,7 +377,9 @@ struct mips_opcode
      || (cpu == CPU_R4010 && ((insn)->membership & INSN_4010) != 0)	\
      || ((cpu == CPU_VR4100 || cpu == CPU_R4111)			\
 	 && ((insn)->membership & INSN_4100) != 0)			\
-     || (cpu == CPU_R3900  && ((insn)->membership & INSN_3900) != 0))
+     || (cpu == CPU_R3900 && ((insn)->membership & INSN_3900) != 0)	\
+     || ((cpu == CPU_R10000 || cpu == CPU_R12000)			\
+	 && ((insn)->membership & INSN_10000) != 0))
 
 /* This is a list of macro expanded instructions.