diff --git a/library/Zend/Form/Element/Collection.php b/library/Zend/Form/Element/Collection.php
index b1ce19f81cd..e3cc6c7491e 100644
--- a/library/Zend/Form/Element/Collection.php
+++ b/library/Zend/Form/Element/Collection.php
@@ -171,8 +171,10 @@ public function populateValues($data)
 
         if ($this->targetElement instanceof FieldsetInterface) {
             foreach ($this->byName as $name => $fieldset) {
-                $fieldset->populateValues($data[$name]);
-                unset($data[$name]);
+                if (isset($data[$name])) {
+                    $fieldset->populateValues($data[$name]);
+                    unset($data[$name]);
+                }
             }
         } else {
             foreach ($this->byName as $name => $element) {