diff --git a/include/spdlog/details/file_helper.h b/include/spdlog/details/file_helper.h
index 245d645b..9a045bd6 100644
--- a/include/spdlog/details/file_helper.h
+++ b/include/spdlog/details/file_helper.h
@@ -29,7 +29,6 @@
 // Can be set to auto flush on every line
 // Throw spdlog_ex exception on errors
 
-#include <cstdio>
 #include <string>
 #include <thread>
 #include <chrono>
diff --git a/include/spdlog/details/os.h b/include/spdlog/details/os.h
index cd9dd61f..6829fd65 100644
--- a/include/spdlog/details/os.h
+++ b/include/spdlog/details/os.h
@@ -28,6 +28,7 @@
 #include<cstdio>
 #include<ctime>
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <Windows.h>
 #endif