diff --git a/docs/usage/tags-interface.md b/docs/usage/tags-interface.md
index 3ff05e649..45e780f31 100644
--- a/docs/usage/tags-interface.md
+++ b/docs/usage/tags-interface.md
@@ -99,6 +99,7 @@ Option | Description
 `requestInterceptor` | `Function=identity`. Either synchronous or asynchronous function transformer that accepts `Request` and should return `Request`.  
 `responseInterceptor` | `Function=identity`. Either synchronous or asynchronous function transformer that accepts `Response` and should return `Response`.
 `userFetch` | `Function=cross-fetch`. Custom **asynchronous** fetch function that accepts two arguments: the `url` and the `Request` object and must return a [Response](https://developer.mozilla.org/en-US/docs/Web/API/Response) object.
+`skipNormalization` | `Boolean=false`. Normalization creates unique operationIds when explicit operationIds are duplicates, and preserve originals.
 
 > *__Note:__ for more information about [requestInterceptor](http-client.md#request-interceptor), [responseInterceptor](http-client.md#response-interceptor) and [userFetch](https://github.com/swagger-api/swagger-js/blob/master/docs/usage/http-client.md#custom-fetch), please refer to the [HTTP Client](http-client.md) documentation.*
 
diff --git a/src/index.js b/src/index.js
index 32412169a..a751b5a66 100644
--- a/src/index.js
+++ b/src/index.js
@@ -74,6 +74,7 @@ Swagger.prototype = {
       useCircularStructures: this.useCircularStructures,
       requestInterceptor: this.requestInterceptor || null,
       responseInterceptor: this.responseInterceptor || null,
+      skipNormalization: this.skipNormalization || false,
       ...options,
     }).then((obj) => {
       this.originalSpec = this.spec;
diff --git a/test/index.js b/test/index.js
index 0faddaaaa..4ee2f2ce5 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,4 +1,5 @@
 import xmock from 'xmock';
+import cloneDeep from 'lodash/cloneDeep';
 
 import Swagger from '../src/index';
 
@@ -710,4 +711,107 @@ describe('constructor', () => {
         .catch(cb);
     });
   });
+
+  describe('skipNormalization', () => {
+    const spec = {
+      openapi: '3.0.0',
+      info: {
+        title: 'Cloudpotato - Medwork',
+        description: 'The Cloudpotato API',
+        version: '1.0.3',
+        contact: {},
+      },
+      tags: [],
+      servers: [],
+      paths: {
+        '/v1/clients/{id}/groups': {
+          get: {
+            operationId: 'getGroups',
+            summary: '',
+            parameters: [
+              {
+                name: 'options',
+                required: false,
+                in: 'query',
+                schema: {
+                  type: 'string',
+                },
+              },
+              {
+                name: 'id',
+                required: true,
+                in: 'path',
+                schema: {
+                  type: 'number',
+                },
+              },
+            ],
+            responses: {
+              200: {
+                description: '',
+              },
+            },
+            tags: ['clients'],
+            security: [
+              {
+                bearer: [],
+              },
+            ],
+          },
+        },
+        '/v1/groups': {
+          get: {
+            operationId: 'getGroups',
+            summary: '',
+            parameters: [],
+            responses: {
+              200: {
+                description: '',
+              },
+            },
+            tags: ['groups'],
+            security: [
+              {
+                bearer: [],
+              },
+            ],
+          },
+        },
+      },
+    };
+
+    /**
+     * We're deep-cloning the spec before using it as resolution mutates
+     * the original object.
+     */
+
+    describe('skipNormalization', () => {
+      describe('given skipNormalization option not provided', () => {
+        test('should resolve with normalized interfaces', async () => {
+          const client = await new Swagger({ spec: cloneDeep(spec) });
+
+          expect(client.apis.clients.getGroups1).toBeInstanceOf(Function);
+          expect(client.apis.groups.getGroups2).toBeInstanceOf(Function);
+        });
+      });
+
+      describe('given skipNormalization option provided as `false`', () => {
+        test('should resolve with normalized interfaces', async () => {
+          const client = await new Swagger({ spec: cloneDeep(spec), skipNormalization: false });
+
+          expect(client.apis.clients.getGroups1).toBeInstanceOf(Function);
+          expect(client.apis.groups.getGroups2).toBeInstanceOf(Function);
+        });
+      });
+
+      describe('given skipNormalization option provided as `true`', () => {
+        test('should resolve with normalized interfaces', async () => {
+          const client = await new Swagger({ spec: cloneDeep(spec), skipNormalization: true });
+
+          expect(client.apis.clients.getGroups).toBeInstanceOf(Function);
+          expect(client.apis.groups.getGroups).toBeInstanceOf(Function);
+        });
+      });
+    });
+  });
 });