diff --git a/src/Curl.class.php b/src/Curl.class.php
index 5d5e344..f77a780 100644
--- a/src/Curl.class.php
+++ b/src/Curl.class.php
@@ -309,7 +309,8 @@ class Curl
                     if (!is_null($json_obj)) {
                         $response = $json_obj;
                     }
-                } elseif (preg_match('/^application\/rss\+xml/i', $response_headers['Content-Type']) ||
+                } elseif (preg_match('/^application\/atom\+xml/i', $response_headers['Content-Type']) ||
+                          preg_match('/^application\/rss\+xml/i', $response_headers['Content-Type']) ||
                           preg_match('/^application\/xml/i', $response_headers['Content-Type']) ||
                           preg_match('/^text\/xml/i', $response_headers['Content-Type'])) {
                     $xml_obj = @simplexml_load_string($response);
diff --git a/tests/PHPCurlClass/PHPCurlClassTest.php b/tests/PHPCurlClass/PHPCurlClassTest.php
index 8c55bf3..c4314ea 100644
--- a/tests/PHPCurlClass/PHPCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPCurlClassTest.php
@@ -574,6 +574,8 @@ class CurlTest extends PHPUnit_Framework_TestCase
             PHPUnit_Framework_Assert::assertInstanceOf('SimpleXMLElement', $test->curl->response);
         }
 
+        xmlAssertion('Content-Type', 'application/atom+xml; charset=UTF-8');
+        xmlAssertion('Content-Type', 'application/atom+xml;charset=UTF-8');
         xmlAssertion('Content-Type', 'application/rss+xml');
         xmlAssertion('Content-Type', 'application/rss+xml; charset=utf-8');
         xmlAssertion('Content-Type', 'application/rss+xml;charset=utf-8');
@@ -584,6 +586,8 @@ class CurlTest extends PHPUnit_Framework_TestCase
         xmlAssertion('Content-Type', 'text/xml; charset=utf-8');
         xmlAssertion('Content-Type', 'text/xml;charset=utf-8');
 
+        xmlAssertion('content-type', 'application/atom+xml; charset=UTF-8');
+        xmlAssertion('content-type', 'application/atom+xml;charset=UTF-8');
         xmlAssertion('content-type', 'application/rss+xml');
         xmlAssertion('content-type', 'application/rss+xml; charset=utf-8');
         xmlAssertion('content-type', 'application/rss+xml;charset=utf-8');
@@ -594,6 +598,8 @@ class CurlTest extends PHPUnit_Framework_TestCase
         xmlAssertion('content-type', 'text/xml; charset=utf-8');
         xmlAssertion('content-type', 'text/xml;charset=utf-8');
 
+        xmlAssertion('CONTENT-TYPE', 'application/atom+xml; charset=UTF-8');
+        xmlAssertion('CONTENT-TYPE', 'application/atom+xml;charset=UTF-8');
         xmlAssertion('CONTENT-TYPE', 'application/rss+xml');
         xmlAssertion('CONTENT-TYPE', 'application/rss+xml; charset=utf-8');
         xmlAssertion('CONTENT-TYPE', 'application/rss+xml;charset=utf-8');