diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 6aa179d..1b4749a 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -102,6 +102,7 @@ class Configuration
                     ->prototype('array')
                         ->performNoDeepMerging()
                         ->children()
+                            ->scalarNode('index_name')->end()
                             ->scalarNode('client')->end()
                             ->scalarNode('finder')
                                 ->treatNullLike(true)
diff --git a/DependencyInjection/FOQElasticaExtension.php b/DependencyInjection/FOQElasticaExtension.php
index 4eba776..7117480 100644
--- a/DependencyInjection/FOQElasticaExtension.php
+++ b/DependencyInjection/FOQElasticaExtension.php
@@ -100,7 +100,8 @@ class FOQElasticaExtension extends Extension
 
             $clientId = $clientIdsByName[$clientName];
             $indexId = sprintf('foq_elastica.index.%s', $name);
-            $indexDefArgs = array($name);
+            $indexName = isset($index['index_name']) ? $index['index_name'] : $name;
+            $indexDefArgs = array($indexName);
             $indexDef = new Definition('%foq_elastica.index.class%', $indexDefArgs);
             $indexDef->setFactoryService($clientId);
             $indexDef->setFactoryMethod('getIndex');