diff --git a/recorder.c b/recorder.c
index 1806ed9..03b5320 100644
--- a/recorder.c
+++ b/recorder.c
@@ -553,7 +553,7 @@ void on_message(struct mosquitto *mosq, void *userdata, const struct mosquitto_m
 {
 	JsonNode *json, *j, *geo = NULL;
 	char *tid = NULL, *t = NULL, *p;
-	double lat, lon;
+	double lat, lon, acc;
 	long tst;
 	struct udata *ud = (struct udata *)userdata;
         char **topics;
@@ -807,7 +807,7 @@ void on_message(struct mosquitto *mosq, void *userdata, const struct mosquitto_m
 
 	tst = time(NULL);
 	if ((j = json_find_member(json, "tst")) != NULL) {
-		if (j && j->tag == JSON_STRING) {
+		if (j->tag == JSON_STRING) {
 			tst = strtoul(j->string_, NULL, 10);
 			json_remove_from_parent(j);
 			json_append_member(json, "tst", json_mknumber(tst));
@@ -821,6 +821,14 @@ void on_message(struct mosquitto *mosq, void *userdata, const struct mosquitto_m
 		goto cleanup;
 	}
 
+	if ((j = json_find_member(json, "acc")) != NULL) {
+		if (j->tag == JSON_STRING) {
+			acc = atof(j->string_);
+			json_remove_from_parent(j);
+			json_append_member(json, "acc", json_mknumber(acc));
+		}
+	}
+
 	if ((j = json_find_member(json, "tid")) != NULL) {
 		if (j->tag == JSON_STRING) {
 			tid = strdup(j->string_);