diff --git a/include/items.php b/include/items.php
index 58fad99272..4a740e55b2 100644
--- a/include/items.php
+++ b/include/items.php
@@ -762,7 +762,7 @@ function dfrn_deliver($owner,$contact,$atom, $dissolve = false) {
 	if(! $rino_enable)
 		$rino = 0;
 
-	$url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino=1' : '');
+	$url = $contact['notify'] . '?f=&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino=1' : '');
 
 	logger('dfrn_deliver: ' . $url);
 
diff --git a/include/poller.php b/include/poller.php
index 8619697d96..98c55a2a92 100644
--- a/include/poller.php
+++ b/include/poller.php
@@ -167,7 +167,7 @@ function poller_run($argv, $argc){
 				if(intval($contact['duplex']) && $contact['issued-id'])
 					$idtosend = '1:' . $orig_id;		
 
-				$url = $contact['poll'] . '?dfrn_id=' . $idtosend 
+				$url = $contact['poll'] . '?f=&dfrn_id=' . $idtosend 
 					. '&dfrn_version=' . DFRN_PROTOCOL_VERSION 
 					. '&type=data&last_update=' . $last_update ;
 	
diff --git a/mod/dfrn_poll.php b/mod/dfrn_poll.php
index eb499fbd1a..686a42d082 100644
--- a/mod/dfrn_poll.php
+++ b/mod/dfrn_poll.php
@@ -63,7 +63,7 @@ function dfrn_poll_init(&$a) {
 		
 		if(count($r)) {
 
-			$s = fetch_url($r[0]['poll'] . '&dfrn_id=' . $my_id . '&type=profile-check');
+			$s = fetch_url($r[0]['poll'] . '?f=&dfrn_id=' . $my_id . '&type=profile-check');
 
 			logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
 
@@ -366,7 +366,7 @@ function dfrn_poll_content(&$a) {
 			// URL reply
 
 			$s = fetch_url($r[0]['poll'] 
-				. '&dfrn_id=' . $encrypted_id 
+				. '?f=&dfrn_id=' . $encrypted_id 
 				. '&type=profile-check'
 				. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 				. '&challenge=' . $challenge
diff --git a/mod/dfrn_request.php b/mod/dfrn_request.php
index f1af1ce4cb..cc63550789 100644
--- a/mod/dfrn_request.php
+++ b/mod/dfrn_request.php
@@ -172,7 +172,7 @@ function dfrn_request_post(&$a) {
 					$dfrn_request = $contact_record['request'];
 
 				if(strlen($dfrn_request) && strlen($confirm_key))
-					$s = fetch_url($dfrn_request . '&confirm_key=' . $confirm_key);
+					$s = fetch_url($dfrn_request . '?f=&confirm_key=' . $confirm_key);
 				
 				// (ignore reply, nothing we can do it failed)