diff --git a/src/Input.php b/src/Input.php
index dbd23cc2..277340be 100644
--- a/src/Input.php
+++ b/src/Input.php
@@ -313,13 +313,13 @@ protected function injectNotEmptyValidator()
         }
         $chain = $this->getValidatorChain();
 
-        // Check if NotEmpty validator is already first in chain
+        // Check if NotEmpty validator is already in chain
         $validators = $chain->getValidators();
-        if (isset($validators[0]['instance'])
-            && $validators[0]['instance'] instanceof NotEmpty
-        ) {
-            $this->notEmptyValidator = true;
-            return;
+        foreach ($validators as $validator) {
+            if ($validator['instance'] instanceof NotEmpty) {
+                $this->notEmptyValidator = true;
+                return;
+            }
         }
 
         $chain->prependByName('NotEmpty', array(), true);
diff --git a/test/InputTest.php b/test/InputTest.php
index 911fdc9f..937b3e55 100644
--- a/test/InputTest.php
+++ b/test/InputTest.php
@@ -240,4 +240,25 @@ public function testMerge()
         $filters = $filterChain->getFilters()->toArray();
         $this->assertInstanceOf('Zend\Filter\StringTrim', $filters[0]);
     }
+
+    public function testDoNotInjectNotEmptyValidatorIfAnywhereInChain()
+    {
+        $input = new Input('foo');
+        $this->assertTrue($input->isRequired());
+        $input->setValue('');
+
+        $notEmptyMock = $this->getMock('Zend\Validator\NotEmpty', array('isValid'));
+        $notEmptyMock->expects($this->exactly(1))
+                     ->method('isValid')
+                     ->will($this->returnValue(false));
+
+        $validatorChain = $input->getValidatorChain();
+        $validatorChain->addValidator(new Validator\Digits());
+        $validatorChain->addValidator($notEmptyMock);
+        $this->assertFalse($input->isValid());
+
+        $validators = $validatorChain->getValidators();
+        $this->assertEquals(2, count($validators));
+        $this->assertEquals($notEmptyMock, $validators[1]['instance']);
+    }
 }