diff --git a/src/systemtask/SystemTask.cpp b/src/systemtask/SystemTask.cpp
index 71eaf4d9..e22265f6 100644
--- a/src/systemtask/SystemTask.cpp
+++ b/src/systemtask/SystemTask.cpp
@@ -426,7 +426,7 @@ void SystemTask::Work() {
           break;
         case Messages::LowBattery: {
           Pinetime::Controllers::NotificationManager::Notification notif;
-          std::array<char, 101> message {"Low Battery\0Charge your watch to prevent data loss.\0"};
+          std::array<char, Pinetime::Controllers::NotificationManager::MessageSize + 1> message {"Low Battery\0Charge your watch to prevent data loss.\0"};
           notif.message = message;
           notif.size = 53;
           notif.category = Pinetime::Controllers::NotificationManager::Categories::SimpleAlert;