diff --git a/src/TextVisitor.php b/src/TextVisitor.php
index 33f30c5..ec6fcf1 100644
--- a/src/TextVisitor.php
+++ b/src/TextVisitor.php
@@ -109,7 +109,7 @@ public function visitDirective(\Graphpinator\Typesystem\Directive $directive) :
             $schema .= ' repeatable';
         }
 
-        return $schema . ' on ' . \implode(' | ', $directive->getLocations());
+        return $schema . ' on ' . \implode(' | ', \array_column($directive->getLocations(), 'value'));
     }
 
     public function visitField(\Graphpinator\Typesystem\Field\Field $field) : string