diff --git a/src/c/main.c b/src/c/main.c
index b81afa0..17abb77 100644
--- a/src/c/main.c
+++ b/src/c/main.c
@@ -142,6 +142,10 @@ static void toggle_temp_warning_state(bool enable_warning) {
 }
 
 static void update_temperature() {
+	if (!s_pkjs_ready) {
+		return;
+	}
+
 	DictionaryIterator *out;
 	AppMessageResult result = app_message_outbox_begin(&out);
 	if (result != APP_MSG_OK) {
@@ -185,7 +189,7 @@ static void minute_handler(struct tm *tick_time, TimeUnits units_changed) {
 	if (!s_showing_date) {
 		update_minute_1();
 	}
-	if (s_pkjs_ready && tick_time->tm_min % 30 == 0) {
+	if (tick_time->tm_min % 30 == 0) {
 		update_temperature();
 	}
 }
@@ -361,6 +365,7 @@ static void main_window_unload() {
 static void inbox_received_handler(DictionaryIterator *iter, void *context) {
 	Tuple *ready_tuple = dict_find(iter, MESSAGE_KEY_PKJS_READY);
 	if (ready_tuple) {
+		s_pkjs_ready = true;
 		update_temperature();
 		return;
 	}