diff --git a/src/uraid.c b/src/uraid.c
index f610c9f..8248350 100644
--- a/src/uraid.c
+++ b/src/uraid.c
@@ -143,7 +143,7 @@ v filename              Save the virtual memory on the filename(Not Bootable)
 /************************************************************************/
 
 extern int DisplayRasterWidth;
-extern unsigned int LispWindowFd, LispKbdFd;
+extern int LispWindowFd, LispKbdFd;
 extern fd_set LispReadFds;
 extern struct cursor CurrentCursor, InvisibleCursor;
 extern struct screen LispScreen;