diff --git a/CRM/Dedupe/Merger.php b/CRM/Dedupe/Merger.php
index e3d2791416e9d339858dfb6f234ab8985c1a8074..f59614dabe2e82f9283d54873d0f4a4e84740608 100644
--- a/CRM/Dedupe/Merger.php
+++ b/CRM/Dedupe/Merger.php
@@ -1496,6 +1496,7 @@ INNER JOIN  civicrm_membership membership2 ON membership1.membership_type_id = m
   static function getContactFields() {
     $contactFields = CRM_Contact_DAO_Contact::fields();
     unset($contactFields['id']);
+    unset($contactFields['hash']);
 
     return array_keys($contactFields);
   }