diff --git a/bfdd/bfd.c b/bfdd/bfd.c
index 0d2c61ac7d..49cb586db1 100644
--- a/bfdd/bfd.c
+++ b/bfdd/bfd.c
@@ -1111,13 +1111,13 @@ static const char *get_diag_str(int diag)
 	return "N/A";
 }
 
-const char *satostr(struct sockaddr_any *sa)
+const char *satostr(const struct sockaddr_any *sa)
 {
 #define INETSTR_BUFCOUNT 8
 	static char buf[INETSTR_BUFCOUNT][INET6_ADDRSTRLEN];
 	static int bufidx;
-	struct sockaddr_in *sin = &sa->sa_sin;
-	struct sockaddr_in6 *sin6 = &sa->sa_sin6;
+	const struct sockaddr_in *sin = &sa->sa_sin;
+	const struct sockaddr_in6 *sin6 = &sa->sa_sin6;
 
 	bufidx += (bufidx + 1) % INETSTR_BUFCOUNT;
 	buf[bufidx][0] = 0;
diff --git a/bfdd/bfd.h b/bfdd/bfd.h
index 1cc9ddb470..93873eed94 100644
--- a/bfdd/bfd.h
+++ b/bfdd/bfd.h
@@ -529,7 +529,7 @@ void bs_state_handler(struct bfd_session *bs, int nstate);
 void bs_echo_timer_handler(struct bfd_session *bs);
 void bs_final_handler(struct bfd_session *bs);
 void bs_set_slow_timers(struct bfd_session *bs);
-const char *satostr(struct sockaddr_any *sa);
+const char *satostr(const struct sockaddr_any *sa);
 const char *diag2str(uint8_t diag);
 int strtosa(const char *addr, struct sockaddr_any *sa);
 void integer2timestr(uint64_t time, char *buf, size_t buflen);