diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index e7983e3a..35342317 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -104,7 +104,6 @@ using string_view_t = fmt::basic_string_view<char>;
 using wstring_view_t = fmt::basic_string_view<wchar_t>;
 using memory_buf_t = fmt::basic_memory_buffer<char, 250>;
 using wmemory_buf_t = fmt::basic_memory_buffer<wchar_t, 250>;
-using filename_memory_buf_t = fmt::basic_memory_buffer<filename_t::value_type, 250>;
 
 #ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
 #ifndef _WIN32
diff --git a/tests/test_daily_logger.cpp b/tests/test_daily_logger.cpp
index 10e365c5..5ab1e206 100644
--- a/tests/test_daily_logger.cpp
+++ b/tests/test_daily_logger.cpp
@@ -3,6 +3,8 @@
  */
 #include "includes.h"
 
+using filename_memory_buf_t = fmt::basic_memory_buffer<spdlog::filename_t::value_type, 250>;
+
 TEST_CASE("daily_logger with dateonly calculator", "[daily_logger]")
 {
     using sink_type = spdlog::sinks::daily_file_sink<std::mutex, spdlog::sinks::daily_filename_calculator>;
@@ -12,7 +14,7 @@ TEST_CASE("daily_logger with dateonly calculator", "[daily_logger]")
     // calculate filename (time based)
     spdlog::filename_t basename = SPDLOG_FILENAME_T("test_logs/daily_dateonly");
     std::tm tm = spdlog::details::os::localtime();
-    spdlog::filename_memory_buf_t w;
+    filename_memory_buf_t w;
     fmt::format_to(w, SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
 
     auto logger = spdlog::create<sink_type>("logger", basename, 0, 0);
@@ -37,7 +39,7 @@ struct custom_daily_file_name_calculator
 {
     static spdlog::filename_t calc_filename(const spdlog::filename_t &basename, const tm &now_tm)
     {
-        spdlog::filename_memory_buf_t w;
+        filename_memory_buf_t w;
         fmt::format_to(w, SPDLOG_FILENAME_T("{}{:04d}{:02d}{:02d}"), basename, now_tm.tm_year + 1900, now_tm.tm_mon + 1, now_tm.tm_mday);
         return fmt::to_string(w);
     }
@@ -52,7 +54,7 @@ TEST_CASE("daily_logger with custom calculator", "[daily_logger]")
     // calculate filename (time based)
     spdlog::filename_t basename = SPDLOG_FILENAME_T("test_logs/daily_dateonly");
     std::tm tm = spdlog::details::os::localtime();
-    spdlog::filename_memory_buf_t w;
+    filename_memory_buf_t w;
     fmt::format_to(w, SPDLOG_FILENAME_T("{}{:04d}{:02d}{:02d}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
 
     auto logger = spdlog::create<sink_type>("logger", basename, 0, 0);