diff --git a/library/Zend/Stdlib/Hydrator/ClassMethods.php b/library/Zend/Stdlib/Hydrator/ClassMethods.php
index 7ea4a248b95..07376d95187 100644
--- a/library/Zend/Stdlib/Hydrator/ClassMethods.php
+++ b/library/Zend/Stdlib/Hydrator/ClassMethods.php
@@ -45,10 +45,10 @@ public function __construct($underscoreSeparatedKeys = true)
 
         $this->callableMethodFilter = new OptionalParametersFilter();
 
-        $this->filterComposite->addFilter("is", new IsFilter());
-        $this->filterComposite->addFilter("has", new HasFilter());
-        $this->filterComposite->addFilter("get", new GetFilter());
-        $this->filterComposite->addFilter("parameter", new OptionalParametersFilter(), FilterComposite::CONDITION_AND);
+        $this->filterComposite->addFilter('is', new IsFilter());
+        $this->filterComposite->addFilter('has', new HasFilter());
+        $this->filterComposite->addFilter('get', new GetFilter());
+        $this->filterComposite->addFilter('parameter', new OptionalParametersFilter(), FilterComposite::CONDITION_AND);
     }
 
     /**
@@ -118,7 +118,7 @@ public function extract($object)
         if ($object instanceof FilterProviderInterface) {
             $filter = new FilterComposite(
                 array($object->getFilter()),
-                array(new MethodMatchFilter("getFilter"))
+                array(new MethodMatchFilter('getFilter'))
             );
         } else {
             $filter = $this->filterComposite;