diff --git a/CRM/Mailing/BAO/Mailing.php b/CRM/Mailing/BAO/Mailing.php
index 09983f45bfed..d87088411c6a 100644
--- a/CRM/Mailing/BAO/Mailing.php
+++ b/CRM/Mailing/BAO/Mailing.php
@@ -166,9 +166,10 @@ public static function getRecipients($mailingID) {
         if ($groupType == 'Include') {
           $includeSmartGroupIDs[] = $groupDAO->id;
         }
-        else {
+        elseif ($groupType == 'Exclude') {
           $excludeSmartGroupIDs[] = $groupDAO->id;
         }
+        //NOTE: Do nothing for base
       }
     }