diff --git a/include/spdlog/fmt/fmt.h b/include/spdlog/fmt/fmt.h
--- a/include/spdlog/fmt/fmt.h
+++ b/include/spdlog/fmt/fmt.h
@@ -16,10 +16,7 @@
 #endif
 #ifndef FMT_USE_WINDOWS_H
 #define FMT_USE_WINDOWS_H 0
-#endif
-#include "bundled/core.h"
-#include "bundled/format.h"
-#else // external fmtlib
+#endif // external fmtlib
 #include <fmt/core.h>
 #include <fmt/format.h>
 #endif
diff --git a/include/spdlog/fmt/ostr.h b/include/spdlog/fmt/ostr.h
--- a/include/spdlog/fmt/ostr.h
+++ b/include/spdlog/fmt/ostr.h
@@ -11,8 +11,6 @@
 #ifndef FMT_HEADER_ONLY
 #define FMT_HEADER_ONLY
 #endif
-#include "bundled/ostream.h"
-#include "fmt.h"
-#else
-#include <fmt/ostream.h>
 #endif
+
+#include <fmt/ostream.h>