diff --git a/include/spdlog/details/os.h b/include/spdlog/details/os.h
index ccb849f7..c355753c 100644
--- a/include/spdlog/details/os.h
+++ b/include/spdlog/details/os.h
@@ -24,10 +24,8 @@ SPDLOG_API std::tm gmtime() noexcept;
 // eol definition and folder separator for the current os
 #ifdef _WIN32
 constexpr static const char *default_eol = "\r\n";
-constexpr static const filename_t::value_type folder_seps_filename[] = L"\\/";
 #else
 constexpr static const char *default_eol = "\n";
-constexpr static const filename_t::value_type folder_seps_filename[] = SPDLOG_FILENAME_T("/");
 #endif
 
 // fopen_s on non windows for writing