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-rw-r--r--include/sys/wait.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/sys/wait.h b/include/sys/wait.h
index e73594ae..5e3012ba 100644
--- a/include/sys/wait.h
+++ b/include/sys/wait.h
@@ -17,7 +17,7 @@ pid_t wait (int *);
 int waitid (idtype_t, id_t, siginfo_t *, int);
 pid_t waitpid (pid_t, int *, int );
 
-#ifdef _GNU_SOURCE
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 #include <sys/resource.h>
 pid_t wait3 (int *, int, struct rusage *);
 pid_t wait4 (pid_t, int *, int, struct rusage *);