Fix warning.

diff --git a/src/userprog/tss.c b/src/userprog/tss.c
index 569e8d183336657aa82e04f882cd9ebd80c65b0d..709dd3a21241459ee59045f95f1cc6a57de72e9e 100644 (file)
--- a/src/userprog/tss.c
+++ b/src/userprog/tss.c
@@ -2,6 +2,7 @@
 #include <debug.h>
 #include <stddef.h>
 #include "userprog/gdt.h"
+#include "threads/thread.h"
 #include "threads/palloc.h"
 #include "threads/vaddr.h"