diff --git a/main/Utils/ClassUtils.class.php b/main/Utils/ClassUtils.class.php
index 8f995eb8a0..c290bd70bb 100644
--- a/main/Utils/ClassUtils.class.php
+++ b/main/Utils/ClassUtils.class.php
@@ -223,6 +223,7 @@ public static function checkStaticMethod($methodSignature)
 					if (
 						!class_exists($className)
 						&& !interface_exists($className)
+						&& !(function_exists('trait_exists') && trait_exists($className))
 					) {
 						include $file;
 					}