diff --git a/src/c/main.c b/src/c/main.c
index 20ab461..03d0e37 100644
--- a/src/c/main.c
+++ b/src/c/main.c
@@ -622,6 +622,7 @@ static void alarm_window_load() {
 }
 
 static void alarm_window_unload() {
+	tick_timer_service_unsubscribe();
 	text_layer_destroy(s_counter_txt_layer);
 	window_destroy(s_drop_window);
 	text_layer_destroy(s_side_a_txt_layer);
@@ -768,6 +769,7 @@ static void setter_window_load() {
 }
 
 static void setter_window_unload() {
+	tick_timer_service_unsubscribe();
 	text_layer_destroy(s_setter_txt_layer);
 	layer_destroy(s_setter_highlight_layer);
 	text_layer_destroy(s_counter_txt_layer);