diff --git a/nimble/transport/socket/src/ble_hci_socket.c b/nimble/transport/socket/src/ble_hci_socket.c
index 0a15a5046..8c12b348e 100755
--- a/nimble/transport/socket/src/ble_hci_socket.c
+++ b/nimble/transport/socket/src/ble_hci_socket.c
@@ -167,7 +167,7 @@ static struct ble_hci_sock_state {
     struct os_event ev;
     struct os_callout timer;
 
-    uint8_t rx_off;
+    uint16_t rx_off;
     uint8_t rx_data[512];
 } ble_hci_sock_state;