diff --git a/idd/LGIddInstall/LGIddInstall.c b/idd/LGIddInstall/LGIddInstall.c
index 2814e68c..2aa53365 100644
--- a/idd/LGIddInstall/LGIddInstall.c
+++ b/idd/LGIddInstall/LGIddInstall.c
@@ -1,5 +1,6 @@
 #define WIN32_LEAN_AND_MEAN
 
+#include <io.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>