diff --git a/index.js b/index.js
index b95fdc1..56fca81 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
 const assert = require('nanoassert')
-const { exports: murmur3, memory } = require('./murmur3')()
+const mod = require('./murmur3')()
 
 /**
  * Murmur3 hash
@@ -10,6 +10,11 @@ const { exports: murmur3, memory } = require('./murmur3')()
 module.exports = function murmur3Hash (buf, seed) {
   assert(buf instanceof Uint8Array, 'buf must be Buffer or Uint8Array')
   assert(seed >>> 0 < 0xffffffff + 1, 'seed must be a valid 32-bit integer')
-  memory.set(buf, 0)
-  return murmur3.hash(0, buf.byteLength, seed)
+
+  if (buf.byteLength > mod.memory.byteLength) {
+    mod.realloc(buf.byteLength)
+  }
+
+  mod.memory.set(buf, 0)
+  return mod.exports.hash(0, buf.byteLength, seed)
 }
diff --git a/test.js b/test.js
index d9cf238..2d32d6c 100644
--- a/test.js
+++ b/test.js
@@ -40,5 +40,9 @@ test('fixtures', function (assert) {
   assert.equal(murmur3(Buffer.from('Hello world')) >>> 0, 2911983372, 'Hello world')
   assert.equal(murmur3(Buffer.from('Hello world!')) >>> 0, 1652231212, 'Hello world!')
 
+  assert.equal(murmur3(Buffer.alloc(65535)) >>> 0, 2878094072, '65535 bytes')
+  assert.equal(murmur3(Buffer.alloc(65536)) >>> 0, 2603582549, '65536 bytes')
+  assert.equal(murmur3(Buffer.alloc(65537)) >>> 0, 1955252949, '65537 bytes')
+
   assert.end()
 })