diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 4682f2dc8..6a6f34b83 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2006-05-25  Richard Sandiford  <richard@codesourcery.com>
+
+	* m68k.h (mcf_mask): Define.
+
 2006-05-05  Thiemo Seufer  <ths@mips.com>
             David Ung  <davidu@mips.com>
 
diff --git a/include/opcode/m68k.h b/include/opcode/m68k.h
index d137d9d62..65543e649 100644
--- a/include/opcode/m68k.h
+++ b/include/opcode/m68k.h
@@ -42,6 +42,7 @@
 #define mcfisa_aa 0x4000	/* ColdFire ISA_A+.  */
 #define mcfisa_b 0x8000		/* ColdFire ISA_B.  */
 #define mcfusp   0x10000	/* ColdFire USP instructions.  */
+#define mcf_mask 0x1f200
 
 /* Handy aliases.  */
 #define	m68040up   (m68040 | m68060)