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-rw-r--r--include/signal.h2
1 files changed, 1 insertions, 1 deletions
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);