diff --git a/gas/ChangeLog b/gas/ChangeLog
index 54229d78ab..b45d136ea0 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,7 @@
+2019-04-12  John Darrington <john@darrington.wattle.id.au>
+	
+	config/tc-s12z.h: Remove definition of macro TC_M68K
+
 2019-04-01  John Darrington <john@darrington.wattle.id.au>
 	
 	config/tc-s12z.c: Use bfd_boolean where appropriate.
diff --git a/gas/config/tc-s12z.h b/gas/config/tc-s12z.h
index c95ab04d01..4c5bd22b21 100644
--- a/gas/config/tc-s12z.h
+++ b/gas/config/tc-s12z.h
@@ -20,9 +20,6 @@
 
 struct fix;
 
-/* Define TC_M68K so that we can use the MRI mode.  */
-#define TC_M68K
-
 #define TARGET_BYTES_BIG_ENDIAN 1
 
 /* Motorola assembler specs does not require '.' before pseudo-ops.  */