diff --git a/lib_xua/host/xmosdfu/xmosdfu.cpp b/lib_xua/host/xmosdfu/xmosdfu.cpp
index 5e5c6051..01bcb9b2 100644
--- a/lib_xua/host/xmosdfu/xmosdfu.cpp
+++ b/lib_xua/host/xmosdfu/xmosdfu.cpp
@@ -10,8 +10,10 @@
 #ifndef S_ISDIR
 #define S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
 #endif
+// Aliases for Windows
 #define stat _stat
 #define fstat _fstat
+#define fileno _fileno
 
 #else
 #include <unistd.h>