diff --git a/serialport.c b/serialport.c
index 39ae659..7255ee6 100644
--- a/serialport.c
+++ b/serialport.c
@@ -29,6 +29,7 @@
 #ifdef _WIN32
 #include <windows.h>
 #include <tchar.h>
+#include <stdio.h>
 #else
 #include <termios.h>
 #include <sys/ioctl.h>