diff --git a/os/net/mac/tsch/tsch.c b/os/net/mac/tsch/tsch.c
index 9d0affb8a..1dc0bbc7c 100644
--- a/os/net/mac/tsch/tsch.c
+++ b/os/net/mac/tsch/tsch.c
@@ -275,7 +275,7 @@ keepalive_packet_sent(void *ptr, int status, int transmissions)
   LOG_INFO_(", st %d-%d\n", status, transmissions);
 
   /* We got no ack, try to recover by switching to the last neighbor we received an EB from */
-  if(status != MAC_TX_OK) {
+  if(status == MAC_TX_NOACK) {
     if(linkaddr_cmp(&last_eb_nbr_addr, &linkaddr_null)) {
       LOG_WARN("not able to re-synchronize, received no EB from other neighbors\n");
       if(sync_count == 0) {