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-rw-r--r--man2/wait4.27
1 files changed, 4 insertions, 3 deletions
diff --git a/man2/wait4.2 b/man2/wait4.2
index 82983ac0bf..6f011fe0e2 100644
--- a/man2/wait4.2
+++ b/man2/wait4.2
@@ -20,9 +20,10 @@ Standard C library
.nf
.B #include <sys/wait.h>
.PP
-.BI "pid_t wait3(int *" "wstatus" ", int " options ", struct rusage *" rusage );
-.BI "pid_t wait4(pid_t " pid ", int *" wstatus ", int " options ,
-.BI " struct rusage *" rusage );
+.BI "pid_t wait3(int *_Nullable " "wstatus" ", int " options ,
+.BI " struct rusage *_Nullable " rusage );
+.BI "pid_t wait4(pid_t " pid ", int *_Nullable " wstatus ", int " options ,
+.BI " struct rusage *_Nullable " rusage );
.fi
.PP
.RS -4