diff --git a/library/Businessprocess/Renderer/Renderer.php b/library/Businessprocess/Renderer/Renderer.php
index 1659c71..c6efd46 100644
--- a/library/Businessprocess/Renderer/Renderer.php
+++ b/library/Businessprocess/Renderer/Renderer.php
@@ -16,7 +16,7 @@ use Icinga\Module\Businessprocess\Web\Url;
 abstract class Renderer extends Html
 {
     /** @var BpConfig */
-    protected $bp;
+    protected $config;
 
     /** @var BpNode */
     protected $parent;
@@ -39,12 +39,12 @@ abstract class Renderer extends Html
     /**
      * Renderer constructor.
      *
-     * @param BpConfig $bp
+     * @param BpConfig $config
      * @param BpNode|null $parent
      */
-    public function __construct(BpConfig $bp, BpNode $parent = null)
+    public function __construct(BpConfig $config, BpNode $parent = null)
     {
-        $this->bp = $bp;
+        $this->config = $config;
         $this->parent = $parent;
     }
 
@@ -53,7 +53,7 @@ abstract class Renderer extends Html
      */
     public function getBusinessProcess()
     {
-        return $this->bp;
+        return $this->config;
     }
 
     /**
@@ -102,7 +102,7 @@ abstract class Renderer extends Html
     public function getChildNodes()
     {
         if ($this->wantsRootNodes()) {
-            return $this->bp->getRootNodes();
+            return $this->config->getRootNodes();
         } else {
             return $this->parent->getChildren();
         }
@@ -114,7 +114,7 @@ abstract class Renderer extends Html
     public function countChildNodes()
     {
         if ($this->wantsRootNodes()) {
-            return $this->bp->countChildren();
+            return $this->config->countChildren();
         } else {
             return $this->parent->countChildren();
         }
@@ -323,6 +323,6 @@ abstract class Renderer extends Html
     public function __destruct()
     {
         unset($this->parent);
-        unset($this->bp);
+        unset($this->config);
     }
 }
diff --git a/library/Businessprocess/Renderer/TileRenderer.php b/library/Businessprocess/Renderer/TileRenderer.php
index c544d79..9d6218a 100644
--- a/library/Businessprocess/Renderer/TileRenderer.php
+++ b/library/Businessprocess/Renderer/TileRenderer.php
@@ -14,7 +14,7 @@ class TileRenderer extends Renderer
      */
     public function render()
     {
-        $bp = $this->bp;
+        $bp = $this->config;
         $nodesDiv = Container::create(
             array(
                 'class' => array(
diff --git a/library/Businessprocess/Renderer/TreeRenderer.php b/library/Businessprocess/Renderer/TreeRenderer.php
index 2b1ef26..6069122 100644
--- a/library/Businessprocess/Renderer/TreeRenderer.php
+++ b/library/Businessprocess/Renderer/TreeRenderer.php
@@ -18,7 +18,7 @@ class TreeRenderer extends Renderer
      */
     public function render()
     {
-        $bp = $this->bp;
+        $bp = $this->config;
         $this->add(Container::create(
             array(
                 'id'    => $bp->getHtmlId(),