-#include "gdt.h"
-#include "debug.h"
-#include "mmu.h"
-#include "palloc.h"
-#include "tss.h"
+#include "userprog/gdt.h"
+#include <debug.h>
+#include "userprog/tss.h"
+#include "threads/mmu.h"
+#include "threads/palloc.h"
/* The Global Descriptor Table (GDT).