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-rw-r--r--libc/stdlib/ptsname.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/libc/stdlib/ptsname.c b/libc/stdlib/ptsname.c
index b41f6a118..dfb0d19db 100644
--- a/libc/stdlib/ptsname.c
+++ b/libc/stdlib/ptsname.c
@@ -17,7 +17,6 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#define _ISOC99_SOURCE
#include <stdio.h>
#include <errno.h>
#include <paths.h>