diff --git a/src/hci.c b/src/hci.c
index 0045b6e3f..f084c01df 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -401,6 +401,7 @@ int hci_can_send_prepared_sco_packet_now(hci_con_handle_t con_handle){
             return 0;
         }
     }
+    if (!hci_stack->synchronous_flow_control_enabled) return 1;
     return hci_number_free_sco_slots_for_handle(con_handle) > 0;    
 }
 
diff --git a/src/hci.h b/src/hci.h
index 31913c194..c56f4f2ca 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -587,6 +587,8 @@ typedef enum hci_init_state{
     HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE,
     HCI_INIT_WRITE_PAGE_TIMEOUT,
     HCI_INIT_W4_WRITE_PAGE_TIMEOUT,
+    HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE,
+    HCI_INIT_W4_SYNCHRONOUS_FLOW_CONTROL_ENABLE,
 
     HCI_INIT_WRITE_CLASS_OF_DEVICE,
     HCI_INIT_W4_WRITE_CLASS_OF_DEVICE,
@@ -670,6 +672,7 @@ typedef struct {
     uint16_t acl_data_packet_length;
     uint8_t  sco_packets_total_num;
     uint8_t  sco_data_packet_length;
+    uint8_t  synchronous_flow_control_enabled;
     uint8_t  le_acl_packets_total_num;
     uint16_t le_data_packets_length;