diff --git a/src/PHPSQLParser/builders/JoinBuilder.php b/src/PHPSQLParser/builders/JoinBuilder.php
index 1b324551..c2f1c951 100644
--- a/src/PHPSQLParser/builders/JoinBuilder.php
+++ b/src/PHPSQLParser/builders/JoinBuilder.php
@@ -41,6 +41,7 @@
  */
 
 namespace PHPSQLParser\builders;
+use PHPSQLParser\exceptions\UnsupportedFeatureException;
 
 /**
  * This class implements the builder for the JOIN statement parts (within FROM).