diff --git a/library/Zend/Form/Form.php b/library/Zend/Form/Form.php
index 7e4ecc54eb1..983105dfca6 100644
--- a/library/Zend/Form/Form.php
+++ b/library/Zend/Form/Form.php
@@ -587,17 +587,15 @@ public function setInputFilter(InputFilterInterface $inputFilter)
      */
     public function getInputFilter()
     {
-        if (null === $this->filter) {
-            if ($this->object instanceof InputFilterAwareInterface) {
-                if (null == $this->baseFieldset) {
-                    $this->filter = $this->object->getInputFilter();
-                } else {
-                    $name = $this->baseFieldset->getName();
-                    if (!$this->filter instanceof InputFilterInterface || !$this->filter->has($name)) {
-                        $filter = new InputFilter();
-                        $filter->add($this->object->getInputFilter(), $name);
-                        $this->filter = $filter;
-                    }
+        if ($this->object instanceof InputFilterAwareInterface) {
+            if (null == $this->baseFieldset) {
+                $this->filter = $this->object->getInputFilter();
+            } else {
+                $name = $this->baseFieldset->getName();
+                if (!$this->filter instanceof InputFilterInterface || !$this->filter->has($name)) {
+                    $filter = new InputFilter();
+                    $filter->add($this->object->getInputFilter(), $name);
+                    $this->filter = $filter;
                 }
             }
         }