1 files changed, 1 insertions, 6 deletions

diff --git a/src/m/iris4d.h b/src/m/iris4d.h
index f6fd3f245df..e1d14e69106 100644
--- a/src/m/iris4d.h
+++ b/src/m/iris4d.h
@@ -41,16 +41,11 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define IRIS_4D
 #endif
 
-/* Use type int rather than a union, to represent Lisp_Object */
-/* This is desirable for most machines.  */
-
-#define NO_UNION_TYPE
-
 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
    the bit field into an int.  In other words, if bit fields
    are always unsigned.
 
-   If you use NO_UNION_TYPE, this flag does not matter.  */
+   This flag only matters if you use USE_LISP_UNION_TYPE.  */
 
 #define EXPLICIT_SIGN_EXTEND