diff --git a/emtest/test.h b/emtest/test.h
index 641de0768..29083cad0 100644
--- a/emtest/test.h
+++ b/emtest/test.h
@@ -3,6 +3,6 @@
  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
-#undef W2S	4
-#undef FS 	4
-#undef F2S	8
+/*#define W2S	4	/* double word size */
+/*#define FS 	4	/* float size */
+/*#define F2S	8	/* double size */
diff --git a/include/_tail_cc/sgtty.h b/include/_tail_cc/sgtty.h
index 600774739..b9113f8b7 100644
--- a/include/_tail_cc/sgtty.h
+++ b/include/_tail_cc/sgtty.h
@@ -77,7 +77,7 @@ struct tchars {
 #else
 #define HUPCL	     0000001    /* unused ??? */
 #endif
-#undef COOKED     0000000	/* neither CBREAK nor RAW */
+/*#define COOKED     0000000	/* neither CBREAK nor RAW */
 
 #ifdef __BDS4_2
 #define TIOCGETP (('t'<<8) | 8 | (6 << 16) | 0x40000000)