diff --git a/ostd/filesystem.hh b/ostd/filesystem.hh
index 445b619..badd145 100644
--- a/ostd/filesystem.hh
+++ b/ostd/filesystem.hh
@@ -13,6 +13,7 @@
 #define NOMINMAX
 #include <windows.h>
 #else
+#include <unistd.h>
 #include <dirent.h>
 #include <sys/stat.h>
 #endif
diff --git a/ostd/thread.hh b/ostd/thread.hh
index 28f705a..9c467a4 100644
--- a/ostd/thread.hh
+++ b/ostd/thread.hh
@@ -13,6 +13,7 @@
 #include <unistd.h>
 #else
 #define WIN32_LEAN_AND_MEAN
+#define NOMINMAX
 #include <windows.h>
 #endif