diff --git a/precompiled.h b/precompiled.h
index 149b5ac..0b08b76 100644
--- a/precompiled.h
+++ b/precompiled.h
@@ -34,3 +34,4 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <wchar.h>