diff --git a/src/hulk/pagetable.d b/src/hulk/pagetable.d
index ecab009..12fd31f 100644
--- a/src/hulk/pagetable.d
+++ b/src/hulk/pagetable.d
@@ -9,6 +9,8 @@ enum ulong PT_WRITABLE = 0x2u;
 enum ulong PT_USER = 0x4u;
 enum ulong PT_WRITE_THROUGH = 0x8u;
 enum ulong PT_DISABLE_CACHE = 0x10u;
+enum ulong PT_ACCESSED = 0x20u;
+enum ulong PT_DIRTY = 0x40u;
 enum ulong PT_HUGE_PAGE = 0x80u;
 enum ulong PT_GLOBAL = 0x100u;
 enum ulong PT_NO_EXECUTE = 0x8000_0000_0000_0000u;