upper bound for lap numbers

2 files changed, 3 insertions, 2 deletions

diff --git a/src/components/stopwatch/StopWatchController.cpp b/src/components/stopwatch/StopWatchController.cpp
index 7af80367..311bccc7 100644
--- a/src/components/stopwatch/StopWatchController.cpp
+++ b/src/components/stopwatch/StopWatchController.cpp
@@ -34,7 +34,7 @@ void StopWatchController::Clear() {
 void StopWatchController::AddLapToHistory() {
   TickType_t lapEnd = GetElapsedTime();
   history[0].timeSinceStart = lapEnd;
-  history[0].number = ++maxLapNumber;
+  history[0].number = ++maxLapNumber % lapNumberBoundary;
   history--;
 }
 
diff --git a/src/components/stopwatch/StopWatchController.h b/src/components/stopwatch/StopWatchController.h
index 800ca1b3..0791701c 100644
--- a/src/components/stopwatch/StopWatchController.h
+++ b/src/components/stopwatch/StopWatchController.h
@@ -55,9 +55,10 @@ namespace Pinetime {
 
       // Maximum number of stored laps
       static constexpr int histSize = 2;
+      static constexpr int lapNumberBoundary = 1000;
       // Lap storage
       Utility::CircularBuffer<LapInfo, histSize> history;
-      // Highest lap number; may exceed histSize
+      // Highest lap number; less than lapNumberBoundary, may exceed histSize
       int maxLapNumber;
     };
   }