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-rw-r--r--libc/signal/sigset.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/libc/signal/sigset.c b/libc/signal/sigset.c
index d2a395bcf..5d8c0d0bd 100644
--- a/libc/signal/sigset.c
+++ b/libc/signal/sigset.c
@@ -19,7 +19,6 @@
#include <errno.h>
#define __need_NULL
#include <stddef.h>
-#define __USE_XOPEN_EXTENDED
#include <signal.h>
#include <string.h> /* For the real memset prototype. */