diff --git a/master/fsm_foe.c b/master/fsm_foe.c
index 2e62cdbe..c3adfa8a 100644
--- a/master/fsm_foe.c
+++ b/master/fsm_foe.c
@@ -54,7 +54,7 @@
 // uint8_t  reserved
 // uint32_t PacketNo, Password, ErrorCode
 
-//#define DEBUG_FOE
+#define DEBUG_FOE
 
 /*****************************************************************************/
 
@@ -774,6 +774,7 @@ void ec_fsm_foe_state_data_read(
         if (ec_foe_prepare_send_ack(fsm, datagram)) {
             ec_foe_set_rx_error(fsm, FOE_PROT_ERROR);
         }
+        fsm->state = ec_fsm_foe_state_sent_ack;
         return;
     }
 
@@ -886,7 +887,7 @@ void ec_fsm_foe_state_sent_ack(
         fsm->state = ec_fsm_foe_end;
     }
     else {
-        fsm->rx_expected_packet_no++;
+        fsm->rx_expected_packet_no++; // this should not be incremented when BUSY
         fsm->retries = EC_FSM_RETRIES;
         fsm->state = ec_fsm_foe_state_data_check;
     }