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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 5184c8f82..b41f6a118 100644
--- a/libc/stdlib/ptsname.c
+++ b/libc/stdlib/ptsname.c
@@ -18,7 +18,6 @@
02111-1307 USA. */
#define _ISOC99_SOURCE
-#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <paths.h>