diff --git a/Command/CustomDeduplicateCommand.php b/Command/CustomDeduplicateCommand.php
index aa15ac1..a99302f 100644
--- a/Command/CustomDeduplicateCommand.php
+++ b/Command/CustomDeduplicateCommand.php
@@ -15,7 +15,6 @@
 use Mautic\LeadBundle\Command\DeduplicateCommand;
 use Mautic\LeadBundle\Deduplicate\ContactDeduper;
 use Mautic\PluginBundle\Helper\IntegrationHelper;
-use Mautic\UserBundle\Entity\User;
 use Mautic\UserBundle\Model\UserModel;
 use Monolog\Logger;
 use Symfony\Component\Console\Input\InputInterface;
@@ -122,7 +121,6 @@ protected function execute(InputInterface $input, OutputInterface $output)
         }
 
         $notify = (bool) $input->getOption('notify');
-
         $key = __CLASS__;
         if (!$this->checkRunStatus($input, $output, $key)) {
             if ($notify) {
diff --git a/Deduplicate/CustomDuplications.php b/Deduplicate/CustomDuplications.php
index ec4e01c..0c215a6 100644
--- a/Deduplicate/CustomDuplications.php
+++ b/Deduplicate/CustomDuplications.php
@@ -87,11 +87,15 @@ private function getContactsByUniqueFields($uniqueFieldsWithData, $leadId = null
         $q = $this->entityManager->getConnection()->createQueryBuilder()
             ->select('l.*')
             ->from(MAUTIC_TABLE_PREFIX.'leads', 'l');
-
         // loop through the fields and
         foreach ($uniqueFieldsWithData as $col => $val) {
-            $q->andWhere("l.$col = :".$col)
-                ->setParameter($col, $val);
+            $q->andWhere(
+                $q->expr()->andX(
+                    $q->expr()->eq('l.'.$col, ':'.$col),
+                    $q->expr()->neq('l.'.$col, $q->expr()->literal('')),
+                    $q->expr()->isNotNull('l.'.$col)
+                )
+            )->setParameter($col, $val);
         }
 
         // if we have a lead ID lets use it
@@ -114,7 +118,6 @@ private function getContactsByUniqueFields($uniqueFieldsWithData, $leadId = null
             $q->setMaxResults($limit);
         }
         $results = $q->execute()->fetchAll();
-
         // Collect the IDs
         $leads = [];
         foreach ($results as $r) {
@@ -147,10 +150,6 @@ private function getCustomUniqueData(array $queryFields)
         $uniqueLeadFields = $this->fields->getCustomUniqueFields();
         $uniqueLeadFieldData = [];
         foreach ($queryFields as $k => $v) {
-            // Don't use empty values when checking for duplicates
-            if (empty($v)) {
-                continue;
-            }
             if (in_array($k, $uniqueLeadFields)) {
                 $uniqueLeadFieldData[$k] = $v;
             }