diff --git a/lib/TokenSpecialTerm.php b/lib/TokenSpecialTerm.php
index 46966a8a..64e4b3d4 100644
--- a/lib/TokenSpecialTerm.php
+++ b/lib/TokenSpecialTerm.php
@@ -34,7 +34,7 @@ class SpecialTerm
                 'Info' => array(
                            'class' => $this->sClass,
                            'type' => $this->sType,
-                           'operator' => Operator::toString($this->iOperator)
+                           'operator' => \Nominatim\Operator::toString($this->iOperator)
                           )
                );
     }