diff --git a/index.js b/index.js
index f630e766..5457ff06 100644
--- a/index.js
+++ b/index.js
@@ -146,7 +146,12 @@ function build (schema, options) {
   }
 
   if (options.mode === 'debug') {
-    return { code: dependenciesName.join('\n'), validator, ajv: validator.ajv }
+    return {
+      validator,
+      serializer,
+      code: dependenciesName.join('\n'),
+      ajv: validator.ajv
+    }
   }
 
   if (options.mode === 'standalone') {
@@ -928,8 +933,7 @@ module.exports = build
 
 module.exports.validLargeArrayMechanisms = validLargeArrayMechanisms
 
-module.exports.restore = function ({ code, validator }) {
-  const serializer = new Serializer()
+module.exports.restore = function ({ code, validator, serializer }) {
   // eslint-disable-next-line
   return (Function.apply(null, ['validator', 'serializer', code])
     .apply(null, [validator, serializer]))
diff --git a/test/debug-mode.test.js b/test/debug-mode.test.js
index 623d37f1..b02a08fb 100644
--- a/test/debug-mode.test.js
+++ b/test/debug-mode.test.js
@@ -5,6 +5,7 @@ const fjs = require('..')
 
 const Ajv = require('ajv').default
 const Validator = require('../lib/validator')
+const Serializer = require('../lib/serializer')
 
 function build (opts) {
   return fjs({
@@ -20,17 +21,18 @@ function build (opts) {
 }
 
 test('activate debug mode', t => {
-  t.plan(4)
+  t.plan(5)
   const debugMode = build({ debugMode: true })
 
   t.type(debugMode, 'object')
   t.ok(debugMode.ajv instanceof Ajv)
   t.ok(debugMode.validator instanceof Validator)
+  t.ok(debugMode.serializer instanceof Serializer)
   t.type(debugMode.code, 'string')
 })
 
 test('activate debug mode truthy', t => {
-  t.plan(4)
+  t.plan(5)
 
   const debugMode = build({ debugMode: 'yes' })
 
@@ -38,15 +40,17 @@ test('activate debug mode truthy', t => {
   t.type(debugMode.code, 'string')
   t.ok(debugMode.ajv instanceof Ajv)
   t.ok(debugMode.validator instanceof Validator)
+  t.ok(debugMode.serializer instanceof Serializer)
 })
 
 test('to string auto-consistent', t => {
-  t.plan(5)
+  t.plan(6)
   const debugMode = build({ debugMode: 1 })
 
   t.type(debugMode, 'object')
   t.type(debugMode.code, 'string')
   t.ok(debugMode.ajv instanceof Ajv)
+  t.ok(debugMode.serializer instanceof Serializer)
   t.ok(debugMode.validator instanceof Validator)
 
   const compiled = fjs.restore(debugMode)
@@ -55,7 +59,7 @@ test('to string auto-consistent', t => {
 })
 
 test('to string auto-consistent with ajv', t => {
-  t.plan(5)
+  t.plan(6)
 
   const debugMode = fjs({
     title: 'object with multiple types field',
@@ -75,6 +79,7 @@ test('to string auto-consistent with ajv', t => {
   t.type(debugMode.code, 'string')
   t.ok(debugMode.ajv instanceof Ajv)
   t.ok(debugMode.validator instanceof Validator)
+  t.ok(debugMode.serializer instanceof Serializer)
 
   const compiled = fjs.restore(debugMode)
   const tobe = JSON.stringify({ str: 'Foo' })
@@ -106,3 +111,11 @@ test('to string auto-consistent with ajv-formats', t => {
   t.same(compiled({ str: 'foo@bar.com' }), tobe)
   t.throws(() => compiled({ str: 'foo' }))
 })
+
+test('debug should restore the same serializer instance', t => {
+  t.plan(1)
+
+  const debugMode = fjs({ type: 'integer' }, { debugMode: 1, rounding: 'ceil' })
+  const compiled = fjs.restore(debugMode)
+  t.same(compiled(3.95), 4)
+})