diff --git a/src/Guzzle/Http/Message/Response.php b/src/Guzzle/Http/Message/Response.php
index 30668263..00f59462 100644
--- a/src/Guzzle/Http/Message/Response.php
+++ b/src/Guzzle/Http/Message/Response.php
@@ -845,7 +845,8 @@ class Response extends AbstractMessage
     /**
      * Check if the response is considered fresh.
      *
-     * A response is considered fresh when its age is less than the freshness lifetime (maximum age) of the response.
+     * A response is considered fresh when its age is less than or equal to the freshness lifetime (maximum age) of the
+     * response.
      *
      * @return bool|null
      */
@@ -853,7 +854,7 @@ class Response extends AbstractMessage
     {
         $fresh = $this->getFreshness();
 
-        return $fresh === null ? null : $this->getFreshness() > 0;
+        return $fresh === null ? null : $fresh >= 0;
     }
 
     /**
diff --git a/tests/Guzzle/Tests/Http/Message/ResponseTest.php b/tests/Guzzle/Tests/Http/Message/ResponseTest.php
index 9d108f79..d79c0712 100644
--- a/tests/Guzzle/Tests/Http/Message/ResponseTest.php
+++ b/tests/Guzzle/Tests/Http/Message/ResponseTest.php
@@ -759,6 +759,10 @@ class ResponseTest extends \Guzzle\Tests\GuzzleTestCase
         $this->assertEquals(20, $response->getFreshness());
         $this->assertTrue($response->isFresh());
 
+        $response->setHeader('Age', 120);
+        $this->assertEquals(0, $response->getFreshness());
+        $this->assertTrue($response->isFresh());
+
         $response->setHeader('Age', 150);
         $this->assertEquals(-30, $response->getFreshness());
         $this->assertFalse($response->isFresh());