diff --git a/core/components/phpthumbof/model/aws/sdk.class.php b/core/components/phpthumbof/model/aws/sdk.class.php
index 93e8764..3a44ae5 100644
--- a/core/components/phpthumbof/model/aws/sdk.class.php
+++ b/core/components/phpthumbof/model/aws/sdk.class.php
@@ -133,7 +133,7 @@ function __aws_sdk_ua_callback()
  * Class: CFRuntime
  * 	Container for all shared methods. This is not intended to be instantiated directly, but is extended by the service-specific classes.
  */
-if(class_exists('CFRuntime_Exception') != true) {
+if(class_exists('CFRuntime') != true) {
 	class CFRuntime
 {
 	/*%******************************************************************************************%*/