diff --git a/src/Elasticsearch/ClientBuilder.php b/src/Elasticsearch/ClientBuilder.php
index 0be2affee..e643b878e 100644
--- a/src/Elasticsearch/ClientBuilder.php
+++ b/src/Elasticsearch/ClientBuilder.php
@@ -42,6 +42,8 @@
 
 class ClientBuilder
 {
+    const ALLOWED_METHODS_FROM_CONFIG = ['includePortInHostHeader'];
+
     /**
      * @var Transport
      */
@@ -197,7 +199,7 @@ public static function fromConfig(array $config, bool $quiet = false): Client
     {
         $builder = new static;
         foreach ($config as $key => $value) {
-            $method = "set$key";
+            $method = in_array($key, self::ALLOWED_METHODS_FROM_CONFIG) ? $key : "set$key";
             $reflection = new ReflectionClass($builder);
             if ($reflection->hasMethod($method)) {
                 $func = $reflection->getMethod($method);
diff --git a/tests/Elasticsearch/Tests/ClientBuilderTest.php b/tests/Elasticsearch/Tests/ClientBuilderTest.php
index 330e48aaf..7f754ad38 100644
--- a/tests/Elasticsearch/Tests/ClientBuilderTest.php
+++ b/tests/Elasticsearch/Tests/ClientBuilderTest.php
@@ -216,6 +216,9 @@ public function testFromConfig(array $params)
         $this->assertInstanceOf(Client::class, $client);
     }
 
+    /**
+     * @doesNotPerformAssertions
+     */
     public function testFromConfigQuiteTrueWithUnknownKey()
     {
         $client = ClientBuilder::fromConfig(
@@ -344,4 +347,33 @@ public function testCompatibilityHeaderDefaultIsOff()
             $this->assertNotContains('application/vnd.elasticsearch+json;compatible-with=7', $request['request']['headers']['Accept']);
         }    
     }
+
+    /**
+     * @see https://github.com/elastic/elasticsearch-php/issues/1176
+     */
+    public function testFromConfigWithIncludePortInHostHeader()
+    {
+        $url = 'localhost:1234';
+        $config = [
+            'hosts' => [$url],
+            'includePortInHostHeader' => true,
+            'connectionParams' => [
+                'client' => [
+                    'verbose' => true
+                ]
+            ],
+        ];
+
+        $client = ClientBuilder::fromConfig($config);
+
+        $this->assertInstanceOf(Client::class, $client);
+
+        try {
+            $result = $client->info();
+        } catch (ElasticsearchException $e) {
+            $request = $client->transport->getLastConnection()->getLastRequestInfo();
+            $this->assertTrue(isset($request['request']['headers']['Host'][0]));
+            $this->assertEquals($url, $request['request']['headers']['Host'][0]);
+        }
+    }
 }