diff --git a/documentation/memory.md b/documentation/memory.md
index 24aca6c..c68f394 100644
--- a/documentation/memory.md
+++ b/documentation/memory.md
@@ -16,7 +16,8 @@ Cause create all [pt](./memory/page_table.md) will cost 3MB (768 * 1024 * 4, 768
 |0|left empty so read or write on NULL triggers an interrupt|
 |1-767|user process allocations|
 |768|kernel code and stack|
-|769-1020|kernel allocations|
+|769-1019|kernel allocations|
+|1020|page for page allocations|
 |1021|VBE screen|
 |1022|frame allocator variables|
 |1023|multiboot|
\ No newline at end of file