1 files changed, 0 insertions, 7 deletions

diff --git a/src/m/ibms390.h b/src/m/ibms390.h
index 0acc826a1ea..1a19f7233a0 100644
--- a/src/m/ibms390.h
+++ b/src/m/ibms390.h
@@ -19,13 +19,6 @@ You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
-/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
-   the 24-bit bit field into an int.  In other words, if bit fields
-   are always unsigned.
-
-   This flag only matters if you use USE_LISP_UNION_TYPE.  */
-#define EXPLICIT_SIGN_EXTEND
-
 /* Data type of load average, as read out of kmem.  */
 #define LOAD_AVE_TYPE long