diff --git a/.gitignore b/.gitignore
index 8f313ddb..ab33079c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -388,3 +388,4 @@ support/time remaining test.xlsx
 test/vs2022/Debug MSVC C++20 - Force C++03
 test/vs2022/Release MSVC C++20 - No STL - Optimised -O2 - Sanitiser
 test/test_file_list.txt
+test/reflog.txt
diff --git a/include/etl/private/chrono/day.h b/include/etl/private/chrono/day.h
index 8079680d..b04d3898 100644
--- a/include/etl/private/chrono/day.h
+++ b/include/etl/private/chrono/day.h
@@ -146,7 +146,7 @@ namespace etl
 
     private:
 
-      unsigned value;
+      unsigned char value;
     };
 
     //***********************************************************************