diff --git a/lib/core.js b/lib/core.js
index 14556f73..c15ab6f7 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -3,7 +3,6 @@ const b4a = require('b4a')
 const assert = require('nanoassert')
 const unslab = require('unslab')
 const z32 = require('z32')
-const MemoryOverlay = require('./memory-overlay')
 const Mutex = require('./mutex')
 const MerkleTree = require('./merkle-tree')
 const BlockStore = require('./block-store')
@@ -180,7 +179,7 @@ class SessionState {
   }
 
   memoryOverlay () {
-    const storage = new MemoryOverlay(this.storage)
+    const storage = this.storage.createMemoryOverlay()
     const s = new SessionState(
       this.core,
       storage,