diff --git a/tools/ideviceactivation.c b/tools/ideviceactivation.c
index 757c54e..e75e9e9 100644
--- a/tools/ideviceactivation.c
+++ b/tools/ideviceactivation.c
@@ -28,7 +28,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 #include <ctype.h>
 #ifndef WIN32
 #include <signal.h>