diff --git a/mod/dfrn_poll.php b/mod/dfrn_poll.php
index 436727a78f..f3c1454102 100644
--- a/mod/dfrn_poll.php
+++ b/mod/dfrn_poll.php
@@ -443,7 +443,7 @@ function dfrn_poll_content(&$a) {
 			$encrypted_id = '';
 			$id_str = $my_id . '.' . mt_rand(1000,9999);
 
-			if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
+			if(($r[0]['duplex'] && strlen($r[0]['pubkey'])) || (! strlen($r[0]['prvkey']))) {
 				openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 				openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 			}