fci.h: Include basetsd.h.
diff --git a/include/fci.h b/include/fci.h
index 30bcce1..6ced99f 100644
--- a/include/fci.h
+++ b/include/fci.h
@@ -19,6 +19,8 @@
 #ifndef __WINE_FCI_H
 #define __WINE_FCI_H
 
+#include <basetsd.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* defined(__cplusplus) */