diff --git a/nimble/transport/src/transport.c b/nimble/transport/src/transport.c
index 6c96a29ca..8f54a3f5b 100644
--- a/nimble/transport/src/transport.c
+++ b/nimble/transport/src/transport.c
@@ -24,6 +24,7 @@
 #include <os/os_mempool.h>
 #include <nimble/ble.h>
 #include <nimble/hci_common.h>
+#include <nimble/nimble_opt.h>
 #include <nimble/transport.h>
 #if BLE_TRANSPORT_IPC
 #include <nimble/transport/hci_ipc.h>
diff --git a/nimble/transport/uart/src/hci_uart.c b/nimble/transport/uart/src/hci_uart.c
index c50155b42..af70bc5f1 100644
--- a/nimble/transport/uart/src/hci_uart.c
+++ b/nimble/transport/uart/src/hci_uart.c
@@ -26,6 +26,7 @@
 #include "os/os_mbuf.h"
 #include "os/os_mempool.h"
 #include "hal/hal_uart.h"
+#include "nimble/nimble_opt.h"
 #include "nimble/transport.h"
 #include "nimble/transport/hci_h4.h"