diff --git a/include/signal.h b/include/signal.h
index 3241193ca588..8d7c2813d633 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -95,6 +95,10 @@ int	sigpause(int);
 int	siginterrupt(int, int);
 #endif
 
+#if __POSIX_VISIBLE >= 200809 || __BSD_VISIBLE
+void	psignal(unsigned int, const char *);
+#endif
+
 #if __BSD_VISIBLE
 int	sigblock(int);
 struct __ucontext;		/* XXX spec requires a complete declaration. */
@@ -102,7 +106,6 @@ int	sigreturn(const struct __ucontext *);
 int	sigsetmask(int);
 int	sigstack(const struct sigstack *, struct sigstack *);
 int	sigvec(int, struct sigvec *, struct sigvec *);
-void	psignal(unsigned int, const char *);
 #endif
 __END_DECLS