diff --git a/inc/fields/emailfield.class.php b/inc/fields/emailfield.class.php
index 7b189d266..318f6cd11 100644
--- a/inc/fields/emailfield.class.php
+++ b/inc/fields/emailfield.class.php
@@ -131,6 +131,10 @@ public function parseAnswerValues($input, $nonDestructive = false) {
       return true;
    }
 
+   public function getEmptyParameters() {
+      return [];
+   }
+
    public function equals($value) {
       return $this->value == $value;
    }