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-rw-r--r--man2/sigaltstack.24
1 files changed, 2 insertions, 2 deletions
diff --git a/man2/sigaltstack.2 b/man2/sigaltstack.2
index ca41491ebd..a448da43cd 100644
--- a/man2/sigaltstack.2
+++ b/man2/sigaltstack.2
@@ -13,8 +13,8 @@ Standard C library
.nf
.B #include <signal.h>
.PP
-.BI "int sigaltstack(const stack_t *restrict " ss \
-", stack_t *restrict " old_ss );
+.BI "int sigaltstack(const stack_t *_Nullable restrict " ss ,
+.BI " stack_t *_Nullable restrict " old_ss );
.fi
.PP
.RS -4