diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index 51c41623..36c58c4a 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -11,7 +11,6 @@
 #include <initializer_list>
 #include <memory>
 #include <string>
-#include <filesystem>
 #include <chrono>
 #include <string_view>
 
@@ -48,15 +47,6 @@ namespace sinks {
 class sink;
 }
 
-#ifdef _WIN32
-    // In windows, add L prefix for filename literals (e.g. L"filename.txt")
-    #define SPDLOG_FILENAME_T_INNER(s) L##s
-    #define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
-#else
-    #define SPDLOG_FILENAME_T(s) s
-#endif
-
-using filename_t = std::filesystem::path;
 using log_clock = std::chrono::system_clock;
 using sink_ptr = std::shared_ptr<sinks::sink>;
 using sinks_init_list = std::initializer_list<sink_ptr>;
@@ -146,16 +136,4 @@ private:
 [[noreturn]] SPDLOG_API void throw_spdlog_ex(const std::string &msg, int last_errno);
 [[noreturn]] SPDLOG_API void throw_spdlog_ex(std::string msg);
 
-struct file_event_handlers {
-    file_event_handlers()
-        : before_open(nullptr),
-          after_open(nullptr),
-          before_close(nullptr),
-          after_close(nullptr) {}
-
-    std::function<void(const filename_t &filename)> before_open;
-    std::function<void(const filename_t &filename, std::FILE *file_stream)> after_open;
-    std::function<void(const filename_t &filename, std::FILE *file_stream)> before_close;
-    std::function<void(const filename_t &filename)> after_close;
-};
 }  // namespace spdlog
diff --git a/include/spdlog/details/file_helper.h b/include/spdlog/details/file_helper.h
index 5b027111..97677885 100644
--- a/include/spdlog/details/file_helper.h
+++ b/include/spdlog/details/file_helper.h
@@ -6,6 +6,7 @@
 #include <tuple>
 
 #include "../common.h"
+#include "../file_event_handlers.h"
 
 namespace spdlog {
 namespace details {
@@ -30,7 +31,7 @@ public:
     void close();
     void write(const memory_buf_t &buf) const;
     size_t size() const;
-    const filename_t &filename() const;    
+    const filename_t &filename() const;
 
 private:
     const int open_tries_ = 5;
diff --git a/include/spdlog/details/os.h b/include/spdlog/details/os.h
index 079b2399..f6c6d445 100644
--- a/include/spdlog/details/os.h
+++ b/include/spdlog/details/os.h
@@ -6,6 +6,7 @@
 #include <ctime>  // std::time_t
 #include <tuple>
 #include "../common.h"
+#include "../filename_t.h"
 
 namespace spdlog {
 namespace details {
diff --git a/include/spdlog/file_event_handlers.h b/include/spdlog/file_event_handlers.h
index 6382cf4c..4a53df7f 100644
--- a/include/spdlog/file_event_handlers.h
+++ b/include/spdlog/file_event_handlers.h
@@ -1,8 +1,19 @@
-//
-// Created by gabi on 12/5/24.
-//
+#pragma once
 
-#ifndef FILE_EVENT_HANDLERS_H
-#define FILE_EVENT_HANDLERS_H
+#include <functional>
+#include "./filename_t.h"
 
-#endif //FILE_EVENT_HANDLERS_H
+namespace spdlog {
+struct file_event_handlers {
+    file_event_handlers()
+        : before_open(nullptr),
+          after_open(nullptr),
+          before_close(nullptr),
+          after_close(nullptr) {}
+
+    std::function<void(const filename_t &filename)> before_open;
+    std::function<void(const filename_t &filename, std::FILE *file_stream)> after_open;
+    std::function<void(const filename_t &filename, std::FILE *file_stream)> before_close;
+    std::function<void(const filename_t &filename)> after_close;
+};
+}  // namespace spdlog
diff --git a/include/spdlog/filename_t.h b/include/spdlog/filename_t.h
new file mode 100644
index 00000000..f8756ab3
--- /dev/null
+++ b/include/spdlog/filename_t.h
@@ -0,0 +1,18 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <filesystem>
+
+#ifdef _WIN32
+    // In windows, add L prefix for filename literals (e.g. L"filename.txt")
+    #define SPDLOG_FILENAME_T_INNER(s) L##s
+    #define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
+#else
+    #define SPDLOG_FILENAME_T(s) s
+#endif
+
+namespace spdlog {
+using filename_t = std::filesystem::path;
+}  // namespace spdlog