diff --git a/search/booleanSearch.php b/search/booleanSearch.php
index 0f77442..4de4b32 100755
--- a/search/booleanSearch.php
+++ b/search/booleanSearch.php
@@ -276,7 +276,7 @@ class BooleanSearchDispatcher extends KTStandardDispatcher {
         if(!empty($subgroup['values'])) {
             foreach($subgroup['values'] as $value) {
                 $oCriterion =& $oCriteriaRegistry->getCriterion($value['type']);
-                if($oCriterion == null || $oCriterion == "" || PEAR:isError($oCriterion)) {
+                if($oCriterion == null || $oCriterion == "" || PEAR::isError($oCriterion)) {
                     $this->errorRedirectToMain('Criterion error');
                 }
                 $aGroup[] = $oCriterion->parameterDisplay($value['data']);