diff --git a/package.json b/package.json
index 002485b..ef0d548 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "prebuild": "rm -rf es5 || true",
     "build": "tsc -p tsconfig.publish.json",
     "prepublish": "npm run build",
-    "pretest": "npm run build -- -p tsconfig.test.json",
+    "pretest": "npm run build -- -p tsconfig.test.json && ./node_modules/.bin/cpx ./spec/bookshelf-es6-spec.js ./es5/spec",
     "test": "jasmine"
   },
   "repository": {
@@ -60,6 +60,7 @@
     "@types/lodash": "4.14.93",
     "@types/qs": "6.5.1",
     "bookshelf": "0.10.4",
+    "cpx": "^1.5.0",
     "jasmine": "2.9.0",
     "knex": "0.13.0",
     "typescript": "2.6.2"
diff --git a/spec/bookshelf-es6-spec.js b/spec/bookshelf-es6-spec.js
new file mode 100644
index 0000000..305ee62
--- /dev/null
+++ b/spec/bookshelf-es6-spec.js
@@ -0,0 +1,193 @@
+"use strict"
+
+const _ = require('lodash')
+const Bookshelf = require('bookshelf')
+const knex = require('knex')
+const Mapper = require('../src')
+
+describe('Issues', () => {
+  let bookshelf;
+  let mapper;
+  const domain = 'https://domain.com'
+
+  beforeAll(() => {
+    bookshelf = Bookshelf(knex(({ client: 'sqlite3', useNullAsDefault: true })))
+    mapper = new Mapper.Bookshelf(domain)
+  })
+
+  afterAll(done => {
+    bookshelf.knex.destroy(done)
+  })
+
+  describe('ES6 virtuals', () => {
+    beforeAll(() => {
+      bookshelf.plugin('virtuals');
+      mapper = new Mapper.Bookshelf(domain);
+    })
+
+    it('should return virtuals', () => {
+      class UserModel extends bookshelf.Model {
+        get virtuals() {
+          return {
+            full_name: function() {
+              return `${this.get('first_name')} ${this.get('last_name')}`
+            }
+          }
+        }
+      }
+
+      const user = new UserModel({
+        id: 1,
+        first_name: 'Al',
+        last_name: 'Bundy'
+      })
+
+      const result = mapper.map(user, 'user')
+      const expected = {
+        links: {
+          self: 'https://domain.com/users'
+        },
+        data: {
+          type: 'users',
+          id: '1',
+          links: {
+            self: 'https://domain.com/users/1'
+          },
+          attributes: {
+            first_name: 'Al',
+            last_name: 'Bundy',
+            full_name: 'Al Bundy'
+          }
+        }
+      }
+
+      expect(_.isMatch(result, expected)).toBe(true)
+    })
+
+    it('shouldn\'t return virtuals if outputVirtuals is set to false', () => {
+      class UserModel extends bookshelf.Model {
+        get virtuals() {
+          return {
+            full_name: function() {
+              return `${this.get('first_name')} ${this.get('last_name')}`
+            }
+          }
+        }
+        get outputVirtuals() {
+          return false
+        }
+      }
+
+      const user = new UserModel({
+        id: 1,
+        first_name: 'Al',
+        last_name: 'Bundy'
+      });
+
+      const result = mapper.map(user, 'user')
+      const expected = {
+        links: {
+          self: 'https://domain.com/users'
+        },
+        data: {
+          type: 'users',
+          id: '1',
+          links: {
+            self: 'https://domain.com/users/1'
+          },
+          attributes: {
+            first_name: 'Al',
+            last_name: 'Bundy'
+          }
+        }
+      }
+
+      expect(_.isMatch(result, expected)).toBe(true)
+    })
+
+    it('outputVirtuals as mapper option should override the default outputVirtuals', () => {
+      class UserModel extends bookshelf.Model {
+        get virtuals() {
+          return {
+            full_name: function() {
+              return `${this.get('first_name')} ${this.get('last_name')}`
+            }
+          }
+        }
+        get outputVirtuals() {
+          return false
+        }
+      }
+
+      class UserModel1 extends bookshelf.Model {
+        get virtuals() {
+          return {
+            full_name: function() {
+              return `${this.get('first_name')} ${this.get('last_name')}`
+            }
+          }
+        }
+        get outputVirtuals() {
+          return true
+        }
+      }
+
+      const user1 = new UserModel({
+        id: 1,
+        first_name: 'Al',
+        last_name: 'Bundy'
+      });
+
+      const user2 = new UserModel1({
+        id: 1,
+        first_name: 'Al',
+        last_name: 'Bundy'
+      });
+
+      const result1_with = mapper.map(user1, 'user', {outputVirtuals: true})
+      const result1_without = mapper.map(user1, 'user', {outputVirtuals: false})
+      const result2_with = mapper.map(user2, 'user', {outputVirtuals: true})
+      const result2_without = mapper.map(user2, 'user', {outputVirtuals: false})
+
+      const expected_with = {
+        links: {
+          self: 'https://domain.com/users'
+        },
+        data: {
+          type: 'users',
+          id: '1',
+          links: {
+            self: 'https://domain.com/users/1'
+          },
+          attributes: {
+            first_name: 'Al',
+            last_name: 'Bundy'
+          }
+        }
+      }
+
+      const expected_without = {
+        links: {
+          self: 'https://domain.com/users'
+        },
+        data: {
+          type: 'users',
+          id: '1',
+          links: {
+            self: 'https://domain.com/users/1'
+          },
+          attributes: {
+            first_name: 'Al',
+            last_name: 'Bundy'
+          }
+        }
+      }
+
+      expect(_.isMatch(result1_with, expected_with)).toBe(true)
+      expect(_.isMatch(result2_with, expected_with)).toBe(true)
+      expect(_.isMatch(result1_without, expected_without)).toBe(true)
+      expect(_.isMatch(result2_without, expected_without)).toBe(true)
+    })
+
+  });
+});
diff --git a/src/bookshelf/utils.ts b/src/bookshelf/utils.ts
index 15c31a6..c3502d3 100644
--- a/src/bookshelf/utils.ts
+++ b/src/bookshelf/utils.ts
@@ -118,7 +118,9 @@ function sample(data: Data): Sample {
     // Override type because we will overwrite relations
     const sampled: Sample = cloneDeep(omit(data, 'relations')) as Sample;
     sampled.relations = mapValues(data.relations, sample);
-
+    if (!isUndefined(data.virtuals)) {
+      sampled.virtuals = cloneDeep(data.virtuals);
+    }
     return sampled;
   } else if (isCollection(data)) {
     const first: Model = data.head();