diff --git a/bench/async_bench.cpp b/bench/async_bench.cpp
index d9714687..c3ee247e 100644
--- a/bench/async_bench.cpp
+++ b/bench/async_bench.cpp
@@ -9,7 +9,12 @@
 #include "spdlog/spdlog.h"
 #include "spdlog/async.h"
 #include "spdlog/sinks/basic_file_sink.h"
+
+#ifdef SPDLOG_FMT_EXTERNAL
+#include <fmt/locale.h>
+#else
 #include "spdlog/fmt/bundled/locale.h"
+#endif
 
 #include "utils.h"
 #include <atomic>
diff --git a/bench/bench.cpp b/bench/bench.cpp
index b7d2fc73..1abb1aa5 100644
--- a/bench/bench.cpp
+++ b/bench/bench.cpp
@@ -11,7 +11,12 @@
 #include "spdlog/sinks/daily_file_sink.h"
 #include "spdlog/sinks/null_sink.h"
 #include "spdlog/sinks/rotating_file_sink.h"
+
+#ifdef SPDLOG_FMT_EXTERNAL
+#include <fmt/locale.h>
+#else
 #include "spdlog/fmt/bundled/locale.h"
+#endif
 
 #include "utils.h"
 #include <atomic>