diff --git a/include/spdlog/sinks/daily_file_sink.h b/include/spdlog/sinks/daily_file_sink.h
index e6f67475..4b9062d5 100644
--- a/include/spdlog/sinks/daily_file_sink.h
+++ b/include/spdlog/sinks/daily_file_sink.h
@@ -53,7 +53,7 @@ struct daily_filename_format_calculator
 #if defined(_MSC_VER) && defined(SPDLOG_WCHAR_FILENAMES) // for some reason msvc doesnt allow fmt::runtime(..) with wchar here
         return fmt::format(fmt_filename, now_tm);
 #else
-        return fmt::format(fmt_filename, now_tm);
+        return fmt::format(fmt::runtime(fmt_filename), now_tm);
 #endif
     }
 };