diff --git a/src/Template/TwigExtension.php b/src/Template/TwigExtension.php
index e43c178..0ba1c1e 100644
--- a/src/Template/TwigExtension.php
+++ b/src/Template/TwigExtension.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Drupal\components\Template;
+
 use Drupal\Core\Render\RendererInterface;
 
 /**
diff --git a/src/Template/TwigNodeTheme.php b/src/Template/TwigNodeTheme.php
index 0196944..f6d987d 100644
--- a/src/Template/TwigNodeTheme.php
+++ b/src/Template/TwigNodeTheme.php
@@ -7,10 +7,10 @@ namespace Drupal\components\Template;
  */
 class TwigNodeTheme extends \Twig_Node implements \Twig_NodeOutputInterface {
 
-  public function __construct(\Twig_Node_Expression $theme, \Twig_Node_Expression $variables = null, $ignore_missing = false, $lineno, $tag = null) {
+  public function __construct(\Twig_Node_Expression $theme, \Twig_Node_Expression $variables = NULL, $lineno, $tag = NULL) {
     parent::__construct(
-      array('theme' => $theme, 'variables' => $variables),
-      array('ignore_missing' => (bool) $ignore_missing),
+      ['theme' => $theme, 'variables' => $variables],
+      [],
       $lineno,
       $tag
     );
@@ -25,23 +25,9 @@ class TwigNodeTheme extends \Twig_Node implements \Twig_NodeOutputInterface {
   public function compile(\Twig_Compiler $compiler) {
     $compiler->addDebugInfo($this);
 
-    if ($this->getAttribute('ignore_missing')) {
-      $compiler->write("try {\n")
-        ->indent();
-    }
-
     $compiler->write('echo ')
       ->subcompile(new \Twig_Node_Expression_Function('theme', new \Twig_Node([$this->getNode('theme'), $this->getNode('variables')]), $this->getLine()))
       ->raw("; \n");
-
-    if ($this->getAttribute('ignore_missing')) {
-      $compiler->outdent()
-        ->write("} catch (Twig_Error_Loader \$e) {\n")
-        ->indent()
-        ->write("// ignore missing theme implementation\n")
-        ->outdent()
-        ->write("}\n\n");
-    }
   }
 
 }
diff --git a/src/Template/TwigThemeTokenParser.php b/src/Template/TwigThemeTokenParser.php
index 1837463..e39d3b8 100644
--- a/src/Template/TwigThemeTokenParser.php
+++ b/src/Template/TwigThemeTokenParser.php
@@ -8,7 +8,7 @@ namespace Drupal\components\Template;
  * @code
  *  {%
  *    theme 'item_list' with {
- *      'items: [],
+ *      items: [],
  *    }
  *  %}
  * @endcode
@@ -21,26 +21,18 @@ class TwigThemeTokenParser extends \Twig_TokenParser {
   public function parse(\Twig_Token $token) {
     $expr = $this->parser->getExpressionParser()->parseExpression();
 
-    list($variables, $ignore_missing) = $this->parseArguments();
-
-    return new TwigNodeTheme($expr, $variables, $ignore_missing, $token->getLine(), $this->getTag());
+    return new TwigNodeTheme($expr, $this->parseArguments(), $token->getLine(), $this->getTag());
   }
 
   /**
    * Parses the arguments.
    *
-   * @return array
+   * @return \Twig_Node_Expression
+   *   A node expression containing the variables list.
    */
   protected function parseArguments() {
     $stream = $this->parser->getStream();
 
-    $ignore_missing = FALSE;
-    if ($stream->nextIf(\Twig_Token::NAME_TYPE, 'ignore')) {
-      $stream->expect(\Twig_Token::NAME_TYPE, 'missing');
-
-      $ignore_missing = TRUE;
-    }
-
     $variables = NULL;
     if ($stream->nextIf(\Twig_Token::NAME_TYPE, 'with')) {
       $variables = $this->parser->getExpressionParser()->parseExpression();
@@ -48,7 +40,7 @@ class TwigThemeTokenParser extends \Twig_TokenParser {
 
     $stream->expect(\Twig_Token::BLOCK_END_TYPE);
 
-    return [$variables, $ignore_missing];
+    return $variables;
   }
 
   /**