diff --git a/include/signal.h b/include/signal.h
index 6625981f11d7646bdc80dbe6ddd4bb46e17c098c..5f39ddbd3943e65fa7b2cb11e7c3b8fea402a056 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -87,6 +87,9 @@ int sigqueue(pid_t, int, const union sigval);
 int pthread_sigmask(int, const sigset_t *, sigset_t *);
 int pthread_kill(pthread_t, int);
 
+void psiginfo(const siginfo_t *, const char *);
+void psignal(int, const char *);
+
 #endif
 
 #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
diff --git a/src/signal/psiginfo.c b/src/signal/psiginfo.c
index fa46d2bf126a89515ee65f94b5623e8c0463ce1d..57be34cd017ca4041f7cb2029e825ad45e796cd7 100644
--- a/src/signal/psiginfo.c
+++ b/src/signal/psiginfo.c
@@ -2,7 +2,7 @@
 #include <string.h>
 #include <signal.h>
 
-void psiginfo(siginfo_t *si, const char *msg)
+void psiginfo(const siginfo_t *si, const char *msg)
 {
 	char *s = strsignal(si->si_signo);
 	if (msg) fprintf(stderr, "%s: %s\n", msg, s);