diff --git a/simpleble/src/Logging.cpp b/simpleble/src/Logging.cpp
index 781b658..6b05e44 100644
--- a/simpleble/src/Logging.cpp
+++ b/simpleble/src/Logging.cpp
@@ -90,7 +90,11 @@ void Logger::log_default_stdout() {
 
 void Logger::log_default_file() {
     std::time_t t = std::time(nullptr);
+#if FMT_VERSION < 120000
     std::string date_time_str = fmt::format("{:%Y-%m-%d_%H-%M-%S}", fmt::localtime(t));
+#else
+    std::string date_time_str = fmt::format("{:%Y-%m-%d_%H-%M-%S}", *std::localtime(&t));
+#endif
     std::string filename = fmt::format("simpleble_{}", date_time_str);
     log_default_file(filename);
 }