diff --git a/src/Curl/Curl.php b/src/Curl/Curl.php
index 72a8ab4..38e3c50 100644
--- a/src/Curl/Curl.php
+++ b/src/Curl/Curl.php
@@ -1068,6 +1068,11 @@ class Curl
     public function unsetHeader($key)
     {
         unset($this->headers[$key]);
+        $headers = array();
+        foreach ($this->headers as $key => $value) {
+            $headers[] = $key . ': ' . $value;
+        }
+        $this->setOpt(CURLOPT_HTTPHEADER, $headers);
     }
 
     /**
diff --git a/tests/PHPCurlClass/PHPCurlClassTest.php b/tests/PHPCurlClass/PHPCurlClassTest.php
index a052f8e..ec7d81e 100644
--- a/tests/PHPCurlClass/PHPCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPCurlClassTest.php
@@ -2979,4 +2979,25 @@ class CurlTest extends PHPUnit_Framework_TestCase
             $this->assertEquals($expected_url, $actual_url);
         }
     }
+
+    public function testUnsetHeader()
+    {
+        $request_key = 'X-Request-Id';
+        $request_value = '1';
+        $data = array(
+            'test' => 'server',
+            'key' => 'HTTP_X_REQUEST_ID',
+        );
+
+        $curl = new Curl();
+        $curl->setHeader($request_key, $request_value);
+        $curl->get(Test::TEST_URL, $data);
+        $this->assertEquals($request_value, $curl->response);
+
+        $curl = new Curl();
+        $curl->setHeader($request_key, $request_value);
+        $curl->unsetHeader($request_key);
+        $curl->get(Test::TEST_URL, $data);
+        $this->assertEquals('', $curl->response);
+    }
 }
diff --git a/tests/PHPCurlClass/PHPMultiCurlClassTest.php b/tests/PHPCurlClass/PHPMultiCurlClassTest.php
index 28a0eb4..4610f80 100644
--- a/tests/PHPCurlClass/PHPMultiCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPMultiCurlClassTest.php
@@ -2383,4 +2383,29 @@ class MultiCurlTest extends PHPUnit_Framework_TestCase
 
         $this->assertNotEmpty($stderr);
     }
+
+    public function testUnsetHeader()
+    {
+        $request_key = 'X-Request-Id';
+        $request_value = '1';
+        $data = array(
+            'test' => 'server',
+            'key' => 'HTTP_X_REQUEST_ID',
+        );
+
+        $multi_curl = new MultiCurl();
+        $multi_curl->setHeader($request_key, $request_value);
+        $multi_curl->addGet(Test::TEST_URL, $data)->complete(function ($instance) use ($request_value) {
+            PHPUnit_Framework_Assert::assertEquals($request_value, $instance->response);
+        });
+        $multi_curl->start();
+
+        $multi_curl = new MultiCurl();
+        $multi_curl->setHeader($request_key, $request_value);
+        $multi_curl->unsetHeader($request_key);
+        $multi_curl->addGet(Test::TEST_URL, $data)->complete(function ($instance) {
+            PHPUnit_Framework_Assert::assertEquals('', $instance->response);
+        });
+        $multi_curl->start();
+    }
 }