diff --git a/DependencyInjection/BeSimpleSoapExtension.php b/DependencyInjection/BeSimpleSoapExtension.php
index 7625b57..a2840ba 100644
--- a/DependencyInjection/BeSimpleSoapExtension.php
+++ b/DependencyInjection/BeSimpleSoapExtension.php
@@ -92,6 +92,8 @@ class BeSimpleSoapExtension extends Extension
                     ->getArgument(1);
 
                 $defOptions['cache_type'] = $options['cache_type'];
+                $defOptions['namespace']  = $options['namespace'];
+
                 $definition->replaceArgument(1, $defOptions);
             }
         }
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index cf95cc4..3b15368 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -73,9 +73,8 @@ class Configuration
                     ->useAttributeAsKey('name')
                     ->prototype('array')
                     ->children()
-                        ->scalarNode('wsdl')
-                            ->isRequired()
-                        ->end()
+                        ->scalarNode('wsdl')->isRequired()->end()
+                        ->scalarNode('namespace')->defaultNull()->end()
                         ->scalarNode('cache_type')
                             ->validate()
                                 ->ifNotInArray($this->cacheTypes)
diff --git a/Resources/config/client.xml b/Resources/config/client.xml
index d98220e..8ef5918 100644
--- a/Resources/config/client.xml
+++ b/Resources/config/client.xml
@@ -13,6 +13,7 @@
             <argument type="collection">
                 <argument key="debug">%kernel.debug%</argument>
                 <argument key="cache_type">null</argument>
+                <argument key="namespace">null</argument>
             </argument>
             <argument type="service" id="besimple.soap.cache" />
         </service>