diff --git a/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php b/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
index d5b1c34bf4..22f84da4a4 100644
--- a/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
+++ b/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
@@ -220,7 +220,7 @@ class BinaryFileResponse extends Response
             $this->maxlen = 0;
         } elseif ($request->headers->has('Range')) {
             // Process the range headers.
-            if (!$request->headers->has('If-Range') || $this->getEtag() === $request->headers->get('If-Range')) {
+            if (!$request->headers->has('If-Range') || $this->hasValidIfRangeHeader($request->headers->get('If-Range'))) {
                 $range = $request->headers->get('Range');
                 $fileSize = $this->file->getSize();
 
@@ -253,6 +253,19 @@ class BinaryFileResponse extends Response
         return $this;
     }
 
+    private function hasValidIfRangeHeader($header)
+    {
+        if ($this->getEtag() === $header) {
+            return true;
+        }
+
+        if (null === $lastModified = $this->getLastModified()) {
+            return false;
+        }
+
+        return $lastModified->format('D, d M Y H:i:s').' GMT' === $header;
+    }
+
     /**
      * Sends the file.
      *
diff --git a/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php
index 35dfab5366..88fb251366 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php
@@ -80,6 +80,37 @@ class BinaryFileResponseTest extends ResponseTestCase
         $this->assertEquals($responseRange, $response->headers->get('Content-Range'));
     }
 
+    /**
+     * @dataProvider provideRanges
+     */
+    public function testRequestsWithoutEtag($requestRange, $offset, $length, $responseRange)
+    {
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'));
+
+        // do a request to get the LastModified
+        $request = Request::create('/');
+        $response->prepare($request);
+        $lastModified = $response->headers->get('Last-Modified');
+
+        // prepare a request for a range of the testing file
+        $request = Request::create('/');
+        $request->headers->set('If-Range', $lastModified);
+        $request->headers->set('Range', $requestRange);
+
+        $file = fopen(__DIR__.'/File/Fixtures/test.gif', 'r');
+        fseek($file, $offset);
+        $data = fread($file, $length);
+        fclose($file);
+
+        $this->expectOutputString($data);
+        $response = clone $response;
+        $response->prepare($request);
+        $response->sendContent();
+
+        $this->assertEquals(206, $response->getStatusCode());
+        $this->assertEquals($responseRange, $response->headers->get('Content-Range'));
+    }
+
     public function provideRanges()
     {
         return array(
@@ -91,6 +122,25 @@ class BinaryFileResponseTest extends ResponseTestCase
         );
     }
 
+    public function testRangeRequestsWithoutLastModifiedDate()
+    {
+        // prevent auto last modified
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'), true, null, false, false);
+
+        // prepare a request for a range of the testing file
+        $request = Request::create('/');
+        $request->headers->set('If-Range', date('D, d M Y H:i:s').' GMT');
+        $request->headers->set('Range', 'bytes=1-4');
+
+        $this->expectOutputString(file_get_contents(__DIR__.'/File/Fixtures/test.gif'));
+        $response = clone $response;
+        $response->prepare($request);
+        $response->sendContent();
+
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertNull($response->headers->get('Content-Range'));
+    }
+
     /**
      * @dataProvider provideFullFileRanges
      */