diff --git a/toml/datetime.hpp b/toml/datetime.hpp
index f0ae405..9429128 100644
--- a/toml/datetime.hpp
+++ b/toml/datetime.hpp
@@ -450,13 +450,13 @@ struct offset_datetime
         : date(ld.date), time(ld.time), offset(get_local_offset())
     {}
     explicit offset_datetime(const std::chrono::system_clock::time_point& tp)
-        : offset_datetime(local_datetime(tp))
+        : offset_datetime(local_datetime(tp)), offset(get_local_offset())
     {}
     explicit offset_datetime(const std::time_t& t)
-        : offset_datetime(local_datetime(t))
+        : offset_datetime(local_datetime(t)), offset(get_local_offset())
     {}
     explicit offset_datetime(const std::tm& t)
-        : offset_datetime(local_datetime(t))
+        : offset_datetime(local_datetime(t)), offset(get_local_offset())
     {}
 
     operator std::chrono::system_clock::time_point() const