diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index ce5c71de0..df85b9fb9 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2012-10-04  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
+
+	* s390.h (s390_opcode_cpu_val): Add S390_OPCODE_ZEC12.
+
 2012-09-04  Sergey A. Guriev <sergey.a.guriev@intel.com>
 
 	* ia64.h (ia64_opnd): Add new operand types.
diff --git a/include/opcode/s390.h b/include/opcode/s390.h
index ed70830c1..531011e0f 100644
--- a/include/opcode/s390.h
+++ b/include/opcode/s390.h
@@ -40,6 +40,7 @@ enum s390_opcode_cpu_val
     S390_OPCODE_Z9_EC,
     S390_OPCODE_Z10,
     S390_OPCODE_Z196,
+    S390_OPCODE_ZEC12,
     S390_OPCODE_MAXCPU
   };