musl - musl - an implementation of the standard library for Linux-based systems

diff --git a/include/signal.h b/include/signal.h
index c36e4d59..87301ba3 100644
--- a/include/signal.h
+++ b/include/signal.h

@@ -196,7 +196,7 @@ void psignal(int, const char *);

#endif

-#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)

+#if defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_GNU_SOURCE)

int killpg(pid_t, int);

int sigaltstack(const stack_t *__restrict, stack_t *__restrict);

int sighold(int);