diff --git a/lpc111x-isp/lpc111x.c b/lpc111x-isp/lpc111x.c
index 3f28ba5..ff92bdc 100644
--- a/lpc111x-isp/lpc111x.c
+++ b/lpc111x-isp/lpc111x.c
@@ -225,7 +225,7 @@ static const struct device {
 static void identify(void)
 {
 	const char *res;
-	unsigned id;
+	unsigned id, serial[4];
 
 	res = dialog_rc(100, "J");
 	if (sscanf(res, "%u", &id) != 1) {
@@ -233,12 +233,21 @@ static void identify(void)
 		exit(1);
 	}
 
+	res = dialog_rc(100, "N");
+	if (sscanf(res, "%u %u %u %u",
+	    serial, serial+1, serial+2, serial+3) != 4) {
+		fprintf(stderr, "N: cannot parse serial number\"%s\"\n", res);
+		exit(1);
+	}
+
 	for (device = devices; device->name; device++)
 		if (device->id == id) {
 			if (!quiet)
-				fprintf(stderr, "%s (0x%04x %04x) %d kB\n",
+				fprintf(stderr, "%s (0x%04x %04x) %d kB "
+				    "serial %08x.%08x.%08x.%08x\n",
 				    device->name, id >> 16, id & 0xffff,
-				    device->flash_kb);
+				    device->flash_kb,
+				    serial[0], serial[1], serial[2], serial[3]);
 			return;
 		}