diff --git a/reactos/ntoskrnl/include/internal/amd64/mm.h b/reactos/ntoskrnl/include/internal/amd64/mm.h
index 6a624a11567..a15bdd08202 100644
--- a/reactos/ntoskrnl/include/internal/amd64/mm.h
+++ b/reactos/ntoskrnl/include/internal/amd64/mm.h
@@ -46,6 +46,7 @@
 #define MI_MIN_PAGES_FOR_NONPAGED_POOL_TUNING ((255*1024*1024) >> PAGE_SHIFT)
 #define MI_MIN_PAGES_FOR_SYSPTE_TUNING        ((19*1024*1024) >> PAGE_SHIFT)
 #define MI_MIN_PAGES_FOR_SYSPTE_BOOST         ((32*1024*1024) >> PAGE_SHIFT)
+#define MI_MIN_PAGES_FOR_SYSPTE_BOOST_BOOST   ((256*1024*1024) >> PAGE_SHIFT)
 #define MI_MIN_INIT_PAGED_POOLSIZE            (32 * 1024 * 1024)
 #define MI_MAX_INIT_NONPAGED_POOL_SIZE        (128ULL * 1024 * 1024 * 1024)
 #define MI_MAX_NONPAGED_POOL_SIZE             (128ULL * 1024 * 1024 * 1024)