diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 0a782f3..f7b0e34 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -107,6 +107,18 @@ class Configuration implements ConfigurationInterface
                     ->scalarNode('password')->defaultValue('')->end()
                     ->scalarNode('dsn')->defaultValue('')->end()
                     ->scalarNode('classname')->defaultValue($this->debug ? 'DebugPDO' : 'PropelPDO')->end()
+                    ->arrayNode('slaves')
+                        ->useAttributeAsKey('name')
+                        ->prototype('array')
+                            ->children()
+                                ->scalarNode('driver')->defaultValue('mysql')->end()
+                                ->scalarNode('user')->defaultValue('root')->end()
+                                ->scalarNode('password')->defaultValue('')->end()
+                                ->scalarNode('dsn')->defaultValue('')->end()
+                                ->scalarNode('classname')->defaultValue($this->debug ? 'DebugPDO' : 'PropelPDO')->end()
+                            ->end()
+                        ->end()
+                    ->end()
                 ->end()
                 ->fixXmlConfig('option')
                 ->children()
@@ -169,6 +181,18 @@ class Configuration implements ConfigurationInterface
                     ->scalarNode('password')->defaultValue('')->end()
                     ->scalarNode('dsn')->defaultValue('')->end()
                     ->scalarNode('classname')->defaultValue($this->debug ? 'DebugPDO' : 'PropelPDO')->end()
+                    ->arrayNode('slaves')
+                        ->useAttributeAsKey('name')
+                        ->prototype('array')
+                            ->children()
+                                ->scalarNode('driver')->defaultValue('mysql')->end()
+                                ->scalarNode('user')->defaultValue('root')->end()
+                                ->scalarNode('password')->defaultValue('')->end()
+                                ->scalarNode('dsn')->defaultValue('')->end()
+                                ->scalarNode('classname')->defaultValue($this->debug ? 'DebugPDO' : 'PropelPDO')->end()
+                            ->end()
+                        ->end()
+                    ->end()
                 ->end()
                 ->fixXmlConfig('option')
                     ->children()