diff --git a/src/Curl/Curl.php b/src/Curl/Curl.php
index afd41d3..dbca6f6 100644
--- a/src/Curl/Curl.php
+++ b/src/Curl/Curl.php
@@ -535,7 +535,7 @@ class Curl
     public function setCookie($key, $value)
     {
         $this->cookies[$key] = $value;
-        $this->setOpt(CURLOPT_COOKIE, str_replace('+', '%20', http_build_query($this->cookies, '', '; ')));
+        $this->setOpt(CURLOPT_COOKIE, str_replace(' ', '%20', urldecode(http_build_query($this->cookies, '', '; '))));
     }
 
     /**
diff --git a/tests/PHPCurlClass/PHPCurlClassTest.php b/tests/PHPCurlClass/PHPCurlClassTest.php
index 5055751..ae16a2a 100644
--- a/tests/PHPCurlClass/PHPCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPCurlClassTest.php
@@ -603,7 +603,7 @@ class CurlTest extends PHPUnit_Framework_TestCase
         )));
     }
 
-    public function testCookieEncoding()
+    public function testCookieEncodingSpace()
     {
         $curl = new Curl();
         $curl->setCookie('cookie', 'Om nom nom nom');
@@ -615,6 +615,18 @@ class CurlTest extends PHPUnit_Framework_TestCase
         $this->assertEquals('cookie=Om%20nom%20nom%20nom', $options[CURLOPT_COOKIE]);
     }
 
+    public function testCookieEncodingColon()
+    {
+        $curl = new Curl();
+        $curl->setCookie('JSESSIONID', '0000wd-PcsB3bZ-KzYGAqm_rKlm:17925chrl');
+
+        $reflectionClass = new ReflectionClass('\Curl\Curl');
+        $reflectionProperty = $reflectionClass->getProperty('options');
+        $reflectionProperty->setAccessible(true);
+        $options = $reflectionProperty->getValue($curl);
+        $this->assertEquals('JSESSIONID=0000wd-PcsB3bZ-KzYGAqm_rKlm:17925chrl', $options[CURLOPT_COOKIE]);
+    }
+
     public function testCookieFile()
     {
         $cookie_file = dirname(__FILE__) . '/cookies.txt';