diff --git a/src/Symfony/Component/Translation/Tests/TranslatorTest.php b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
index ac8a35e72f..3432fdac69 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
@@ -67,6 +67,20 @@ class TranslatorTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('foobar', $translator->trans('bar'));
     }
 
+    public function testAddResourceAfterTrans()
+    {
+        $translator = new Translator('fr', new MessageSelector());
+        $translator->addLoader('array', new ArrayLoader());
+
+        $translator->setFallbackLocales(array('en'));
+
+        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
+        $this->assertEquals('foofoo', $translator->trans('foo'));
+
+        $translator->addResource('array', array('bar' => 'foobar'), 'en');
+        $this->assertEquals('foobar', $translator->trans('bar'));
+    }
+
     /**
      * @dataProvider      getTransFileTests
      * @expectedException \Symfony\Component\Translation\Exception\NotFoundResourceException
diff --git a/src/Symfony/Component/Translation/Translator.php b/src/Symfony/Component/Translation/Translator.php
index 47e8fe183f..a45dd0b75e 100644
--- a/src/Symfony/Component/Translation/Translator.php
+++ b/src/Symfony/Component/Translation/Translator.php
@@ -94,7 +94,11 @@ class Translator implements TranslatorInterface
     {
         $this->resources[$locale][] = array($format, $resource, $domain);
 
-        unset($this->catalogues[$locale]);
+        if(in_array($locale, $this->fallbackLocales)) {
+            $this->catalogues = array();
+        } else {
+            unset($this->catalogues[$locale]);
+        }
     }
 
     /**