diff --git a/net_io.c b/net_io.c
index 50bf803..38820e1 100644
--- a/net_io.c
+++ b/net_io.c
@@ -587,9 +587,9 @@ char *aircraftsToJson(int *len) {
         // No metric conversion
         l = snprintf(p,buflen,
             "{\"hex\":\"%06x\", \"squawk\":\"%04x\", \"flight\":\"%s\", \"lat\":%f, "
-            "\"lon\":%f, \"validposition\":%d, \"altitude\":%d, \"track\":%d, \"validtrack\":%d,"
+            "\"lon\":%f, \"validposition\":%d, \"altitude\":%d,  \"vert_rate\":%d,\"track\":%d, \"validtrack\":%d,"
             "\"speed\":%d, \"messages\":%ld, \"seen\":%d},\n",
-            a->addr, a->modeA, a->flight, a->lat, a->lon, position, a->altitude, a->track, track,
+            a->addr, a->modeA, a->flight, a->lat, a->lon, position, a->altitude, a->vert_rate, a->track, track,
             a->speed, a->messages, (int)(now - a->seen));
         p += l; buflen -= l;