diff --git a/C4/Members/Attributes.pm b/C4/Members/Attributes.pm
index 2f560c7544..1f5a3f0286 100644
--- a/C4/Members/Attributes.pm
+++ b/C4/Members/Attributes.pm
@@ -259,7 +259,7 @@ sub DeleteBorrowerAttributes {
     $query .= $branch_limit
         ? q{
             LEFT JOIN borrower_attribute_types_branches ON bat_code = code
-            WHERE b_branchcode = ? OR b_branchcode IS NULL
+            WHERE ( b_branchcode = ? OR b_branchcode IS NULL )
                 AND borrowernumber = ?
         }
         : q{