diff --git a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
index 26b456145c1c3..7dd43a58a3ecd 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
@@ -29,8 +29,6 @@ class BinaryNode extends Node
     private static $functions = array(
         '**' => 'pow',
         '..' => 'range',
-        'in' => 'in_array',
-        'not in' => '!in_array',
     );
 
     public function __construct(string $operator, Node $left, Node $right)
@@ -57,6 +55,28 @@ public function compile(Compiler $compiler)
             return;
         }
 
+        switch ($operator) {
+            case 'not in':
+                $compiler->raw('!');
+                // no break
+            case 'in':
+                $compiler
+                    ->raw('in_array(')
+                        ->compile($this->nodes['left'])
+                        ->raw(', ')
+                        ->raw('is_array(')
+                            ->compile($this->nodes['right'])
+                        ->raw(') ? ')
+                        ->compile($this->nodes['right'])
+                        ->raw(' : iterator_to_array(')
+                            ->compile($this->nodes['right'])
+                        ->raw(')')
+                    ->raw(')')
+                ;
+
+                return;
+        }
+
         if (isset(self::$functions[$operator])) {
             $compiler
                 ->raw(sprintf('%s(', self::$functions[$operator]))
@@ -92,9 +112,6 @@ public function evaluate($functions, $values)
         if (isset(self::$functions[$operator])) {
             $right = $this->nodes['right']->evaluate($functions, $values);
 
-            if ('not in' === $operator) {
-                return !in_array($left, $right);
-            }
             $f = self::$functions[$operator];
 
             return $f($left, $right);
@@ -135,9 +152,9 @@ public function evaluate($functions, $values)
             case '<=':
                 return $left <= $right;
             case 'not in':
-                return !in_array($left, $right);
+                return !in_array($left, is_array($right) ? $right : iterator_to_array($right));
             case 'in':
-                return in_array($left, $right);
+                return in_array($left, is_array($right) ? $right : iterator_to_array($right));
             case '+':
                 return $left + $right;
             case '-':
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/Collection.php b/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/Collection.php
new file mode 100644
index 0000000000000..7d0d9b218726c
--- /dev/null
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/Collection.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Symfony\Component\ExpressionLanguage\Tests\Fixtures;
+
+class Collection implements \IteratorAggregate
+{
+    public function getIterator()
+    {
+        return new \ArrayIterator(array('a', 'b'));
+    }
+}
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php
index 258d276b53c3d..96ceb668aa83d 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php
@@ -11,9 +11,11 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests\Node;
 
-use Symfony\Component\ExpressionLanguage\Node\BinaryNode;
 use Symfony\Component\ExpressionLanguage\Node\ArrayNode;
+use Symfony\Component\ExpressionLanguage\Node\BinaryNode;
 use Symfony\Component\ExpressionLanguage\Node\ConstantNode;
+use Symfony\Component\ExpressionLanguage\Node\NameNode;
+use Symfony\Component\ExpressionLanguage\Tests\Fixtures\Collection;
 
 class BinaryNodeTest extends AbstractNodeTest
 {
@@ -23,6 +25,8 @@ public function getEvaluateData()
         $array->addElement(new ConstantNode('a'));
         $array->addElement(new ConstantNode('b'));
 
+        $collectionValues = array('collection' => new Collection());
+
         return array(
             array(true, new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))),
             array(true, new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))),
@@ -56,9 +60,13 @@ public function getEvaluateData()
             array('ab', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))),
 
             array(true, new BinaryNode('in', new ConstantNode('a'), $array)),
+            array(true, new BinaryNode('in', new ConstantNode('a'), new NameNode('collection')), $collectionValues),
             array(false, new BinaryNode('in', new ConstantNode('c'), $array)),
+            array(false, new BinaryNode('in', new ConstantNode('c'), new NameNode('collection')), $collectionValues),
             array(true, new BinaryNode('not in', new ConstantNode('c'), $array)),
+            array(true, new BinaryNode('not in', new ConstantNode('c'), new NameNode('collection')), $collectionValues),
             array(false, new BinaryNode('not in', new ConstantNode('a'), $array)),
+            array(false, new BinaryNode('not in', new ConstantNode('a'), new NameNode('collection')), $collectionValues),
 
             array(array(1, 2, 3), new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))),
 
@@ -104,10 +112,10 @@ public function getCompileData()
             array('pow(5, 2)', new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))),
             array('("a" . "b")', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))),
 
-            array('in_array("a", array(0 => "a", 1 => "b"))', new BinaryNode('in', new ConstantNode('a'), $array)),
-            array('in_array("c", array(0 => "a", 1 => "b"))', new BinaryNode('in', new ConstantNode('c'), $array)),
-            array('!in_array("c", array(0 => "a", 1 => "b"))', new BinaryNode('not in', new ConstantNode('c'), $array)),
-            array('!in_array("a", array(0 => "a", 1 => "b"))', new BinaryNode('not in', new ConstantNode('a'), $array)),
+            array('in_array("a", is_array(array(0 => "a", 1 => "b")) ? array(0 => "a", 1 => "b") : iterator_to_array(array(0 => "a", 1 => "b")))', new BinaryNode('in', new ConstantNode('a'), $array)),
+            array('in_array("c", is_array(array(0 => "a", 1 => "b")) ? array(0 => "a", 1 => "b") : iterator_to_array(array(0 => "a", 1 => "b")))', new BinaryNode('in', new ConstantNode('c'), $array)),
+            array('!in_array("c", is_array(array(0 => "a", 1 => "b")) ? array(0 => "a", 1 => "b") : iterator_to_array(array(0 => "a", 1 => "b")))', new BinaryNode('not in', new ConstantNode('c'), $array)),
+            array('!in_array("a", is_array(array(0 => "a", 1 => "b")) ? array(0 => "a", 1 => "b") : iterator_to_array(array(0 => "a", 1 => "b")))', new BinaryNode('not in', new ConstantNode('a'), $array)),
 
             array('range(1, 3)', new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))),