diff --unified --recursive --text readsb-protobuf-4.0.1.orig/readsbrrd.c readsb-protobuf-4.0.1.new/readsbrrd.c
--- readsb-protobuf-4.0.1.orig/readsbrrd.c	2020-12-14 12:01:12.000000000 +0100
+++ readsb-protobuf-4.0.1.new/readsbrrd.c	2020-12-30 20:56:42.205500675 +0100
@@ -20,7 +20,6 @@
 #include "readsbrrd.h"
 #include "readsb.pb-c.h"
 
-extern const char * const sys_siglist[];
 static int readsbrrd_exit = 0;
 static uint8_t *read_buf;
 static error_t parse_opt(int key, char *arg, struct argp_state *state);
@@ -100,7 +99,7 @@
 static void signal_handler(int sig) {
     signal(sig, SIG_DFL); // Reset signal handler
     readsbrrd_exit = 1;
-    fprintf(stderr, "caught signal %s, shutting down..\n", sys_siglist[sig]);
+    fprintf(stderr, "caught signal %s, shutting down..\n", strsignal(sig));
 }
 
 /**