diff --git a/library/Zend/ModuleManager/Listener/ConfigListener.php b/library/Zend/ModuleManager/Listener/ConfigListener.php
index f19729b3022..8d2e9d4dd19 100644
--- a/library/Zend/ModuleManager/Listener/ConfigListener.php
+++ b/library/Zend/ModuleManager/Listener/ConfigListener.php
@@ -89,8 +89,8 @@ public function attach(EventManagerInterface $events)
         }
 
         $this->callbacks[] = $events->attach(ModuleEvent::EVENT_LOAD_MODULE, array($this, 'onLoadModule'));
-        $this->callbacks[] = $events->attach(ModuleEvent::EVENT_LOAD_MODULES, array($this, 'onLoadModulesPost'), -1000);
-
+        $this->callbacks[] = $events->attach(ModuleEvent::EVENT_LOAD_MODULES, array($this, 'onLoadModules'), -1000);
+        $this->callbacks[] = $events->attach(ModuleEvent::EVENT_MERGE_CONFIG, array($this, 'onMergeConfig'), 1000);
         return $this;
     }
 
@@ -137,7 +137,7 @@ public function onLoadModule(ModuleEvent $e)
      * @param  ModuleEvent $e
      * @return ConfigListener
      */
-    public function onLoadModulesPost(ModuleEvent $e)
+    public function onMergeConfig(ModuleEvent $e)
     {
         // Load the config files
         foreach ($this->paths as $path) {
@@ -150,6 +150,24 @@ public function onLoadModulesPost(ModuleEvent $e)
             $this->mergedConfig = ArrayUtils::merge($this->mergedConfig, $config);
         }
 
+        return $this;
+    }
+
+    /**
+     * Optionally cache merged config
+     *
+     * This is only attached if config is not cached.
+     *
+     * @param  ModuleEvent $e
+     * @return ConfigListener
+     */
+    public function onLoadModules(ModuleEvent $e)
+    {
+
+        // Trigger MERGE_CONFIG event. This is a hook to allow the merged application config to be
+        // modified before it is cached (In particular, allows the removal of config keys)
+        $e->getTarget()->getEventManager()->trigger(ModuleEvent::EVENT_MERGE_CONFIG, $e->getTarget(), $e);
+
         // If enabled, update the config cache
         if (
             $this->getOptions()->getConfigCacheEnabled()
diff --git a/library/Zend/ModuleManager/ModuleEvent.php b/library/Zend/ModuleManager/ModuleEvent.php
index c81e773d55c..e29dd8e2834 100644
--- a/library/Zend/ModuleManager/ModuleEvent.php
+++ b/library/Zend/ModuleManager/ModuleEvent.php
@@ -20,6 +20,7 @@ class ModuleEvent extends Event
     /**
      * Module events triggered by eventmanager
      */
+    CONST EVENT_MERGE_CONFIG        = 'mergeConfig';
     CONST EVENT_LOAD_MODULES        = 'loadModules';
     CONST EVENT_LOAD_MODULE_RESOLVE = 'loadModule.resolve';
     CONST EVENT_LOAD_MODULE         = 'loadModule';
diff --git a/tests/ZendTest/ModuleManager/Listener/ConfigListenerTest.php b/tests/ZendTest/ModuleManager/Listener/ConfigListenerTest.php
index f171d1609b5..d92a3544423 100644
--- a/tests/ZendTest/ModuleManager/Listener/ConfigListenerTest.php
+++ b/tests/ZendTest/ModuleManager/Listener/ConfigListenerTest.php
@@ -378,7 +378,7 @@ public function testConfigListenerFunctionsAsAggregateListener()
         $this->assertEquals(2, count($moduleManager->getEventManager()->getEvents()));
 
         $configListener->attach($moduleManager->getEventManager());
-        $this->assertEquals(3, count($moduleManager->getEventManager()->getEvents()));
+        $this->assertEquals(4, count($moduleManager->getEventManager()->getEvents()));
 
         $configListener->detach($moduleManager->getEventManager());
         $this->assertEquals(2, count($moduleManager->getEventManager()->getEvents()));
diff --git a/tests/ZendTest/ModuleManager/Listener/DefaultListenerAggregateTest.php b/tests/ZendTest/ModuleManager/Listener/DefaultListenerAggregateTest.php
index 79ec16bdda1..39f4dcf38e6 100644
--- a/tests/ZendTest/ModuleManager/Listener/DefaultListenerAggregateTest.php
+++ b/tests/ZendTest/ModuleManager/Listener/DefaultListenerAggregateTest.php
@@ -109,7 +109,7 @@ public function testDefaultListenerAggregateCanDetachItself()
         $this->assertEquals(1, count($moduleManager->getEventManager()->getEvents()));
 
         $listenerAggregate->attach($moduleManager->getEventManager());
-        $this->assertEquals(3, count($moduleManager->getEventManager()->getEvents()));
+        $this->assertEquals(4, count($moduleManager->getEventManager()->getEvents()));
 
         $listenerAggregate->detach($moduleManager->getEventManager());
         $this->assertEquals(1, count($moduleManager->getEventManager()->getEvents()));