diff --git a/hbvm/src/vm/mem/mod.rs b/hbvm/src/vm/mem/mod.rs
index 3b91add4..88e82ca2 100644
--- a/hbvm/src/vm/mem/mod.rs
+++ b/hbvm/src/vm/mem/mod.rs
@@ -120,7 +120,7 @@ impl Memory {
                             size: match lvl {
                                 0 => 4096,
                                 1 => 1024_usize.pow(2) * 2,
-                                2 => 4096_usize.pow(3),
+                                2 => 1024_usize.pow(3),
                                 _ => unreachable!(),
                             },
                             offset: addr as usize & ((1 << 12) - 1),