2 files changed, 1 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 7ad1d4a..a27d0c8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 
 CFLAGS  = -Wall -Wextra -Wpedantic -Werror \
 	  -O3 -march=native -mtune=native -fomit-frame-pointer \
-	  -pipe
+	  -pipe -D_POSIX_C_SOURCE=200809
 PREFIX  = /usr
 DPREFIX = ${DESTDIR}${PREFIX}
 MANDIR  = ${DPREFIX}/share/man
diff --git a/center.c b/center.c
index a565158..7ac5d69 100644
--- a/center.c
+++ b/center.c
@@ -15,9 +15,6 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-#define POSIXLY_CORRECT
-#define _POSIX_C_SOURCE 200809L
-
 #include <sys/ioctl.h>
 #include <sys/queue.h>