diff --git a/lib/JSONAPISerializer.js b/lib/JSONAPISerializer.js
index ba71806..83ee9a1 100644
--- a/lib/JSONAPISerializer.js
+++ b/lib/JSONAPISerializer.js
@@ -113,7 +113,7 @@ module.exports = class JSONAPISerializer {
    *
    * @see {@link http://jsonapi.org/format/#document-top-level}
    * @function JSONAPISerializer#serializeAsync
-   * @param {string} type resource's type.
+   * @param {string|object} type resource's type or an object with a dynamic type resolved from data..
    * @param {object|object[]} data input data.
    * @param {string} [schema='default'] resource's schema name.
    * @param {object} [extraData] additional data that can be used in topLevelMeta options.
@@ -362,18 +362,18 @@ module.exports = class JSONAPISerializer {
   deserializeResource(type, data, schema, included) {
     if (typeof type === 'object') {
       type = typeof type.type === 'function' ? type.type(data) : get(data, type.type);
+    }
 
-      if (!type) {
-        throw new Error(`No type can be resolved from data: ${JSON.stringify(data)}`);
-      }
-
-      if (!this.schemas[type]) {
-        throw new Error(`No type registered for ${type}`);
-      }
+    if (!type) {
+      throw new Error(`No type can be resolved from data: ${JSON.stringify(data)}`);
+    }
 
-      schema = 'default';
+    if (!this.schemas[type]) {
+      throw new Error(`No type registered for ${type}`);
     }
 
+    schema = 'default';
+
     const options = this.schemas[type][schema];
 
     let deserializedData = {};
@@ -489,8 +489,8 @@ module.exports = class JSONAPISerializer {
    * @param {string} type resource's type.
    * @param {object|object[]} data input data.
    * @param {object} options resource's configuration options.
-   * @param {Map<string, object>} included Included resources.
-   * @param {object} extraData additional data.
+   * @param {Map<string, object>} [included] Included resources.
+   * @param {object} [extraData] additional data.
    * @returns {object|object[]} serialized data.
    */
   serializeResource(type, data, options, included, extraData) {
@@ -521,8 +521,8 @@ module.exports = class JSONAPISerializer {
    * @private
    * @param {object} typeOption a dynamic type options.
    * @param {object|object[]} data input data.
-   * @param {Map<string, object>} included Included resources.
-   * @param {object} extraData additional data.
+   * @param {Map<string, object>} [included] Included resources.
+   * @param {object} [extraData] additional data.
    * @returns {object|object[]} serialized data.
    */
   serializeMixedResource(typeOption, data, included, extraData) {
@@ -597,8 +597,8 @@ module.exports = class JSONAPISerializer {
    * @private
    * @param {object|object[]} data input data.
    * @param {object} options resource's configuration options.
-   * @param {Map<string, object>} included  Included resources.
-   * @param {object} extraData additional data.
+   * @param {Map<string, object>} [included]  Included resources.
+   * @param {object} [extraData] additional data.
    * @returns {object} serialized relationships.
    */
   serializeRelationships(data, options, included, extraData) {
@@ -657,9 +657,9 @@ module.exports = class JSONAPISerializer {
    * @param {string|Function} rType the relationship's type.
    * @param {string} rSchema the relationship's schema
    * @param {object|object[]} rData relationship's data.
-   * @param {Map<string, object>} included Included resources.
-   * @param {object} data the entire resource's data.
-   * @param {object} extraData additional data.
+   * @param {Map<string, object>} [included] Included resources.
+   * @param {object} [data] the entire resource's data.
+   * @param {object} [extraData] additional data.
    * @returns {object|object[]} serialized relationship data.
    */
   serializeRelationship(rType, rSchema, rData, included, data, extraData) {
diff --git a/test/unit/JSONAPISerializer.test.js b/test/unit/JSONAPISerializer.test.js
index d7230dc..72ede26 100644
--- a/test/unit/JSONAPISerializer.test.js
+++ b/test/unit/JSONAPISerializer.test.js
@@ -1646,6 +1646,53 @@ describe('JSONAPISerializer', function() {
       done();
     });
 
+    it('should throw an error if type has not been registered for included relationship', function(done) {
+      const Serializer = new JSONAPISerializer();
+      Serializer.register('article', {
+        relationships: {
+          author: {
+            type: 'people'
+          }
+        }
+      });
+
+      const data = {
+        data: {
+          id: '1',
+          type: 'article',
+          attributes: {
+            title: 'JSON API paints my bikeshed!',
+            body: 'The shortest article. Ever.',
+            created: '2015-05-22T14:56:29.000Z'
+          },
+          relationships: {
+            author: {
+              data: {
+                type: 'people',
+                id: '1'
+              }
+            }
+          }
+        },
+        included: [{
+          type: 'people',
+          id: '1',
+          attributes: {
+            firstName: 'Kaley',
+            lastName: 'Maggio',
+            email: 'Kaley-Maggio@example.com',
+            age: '80',
+            gender: 'male'
+          }
+        }]
+      };
+
+      expect(function() {
+        Serializer.deserialize('article', data);
+      }).to.throw(Error, 'No type registered for people');
+      done();
+    });
+
     it('should throw an error if custom schema has not been registered', function(done) {
       expect(function() {
         const Serializer = new JSONAPISerializer();