diff --git a/os/hal/ports/sandbox/hal_sio_lld.c b/os/hal/ports/sandbox/hal_sio_lld.c
index d2a9d0e1f..36d523860 100644
--- a/os/hal/ports/sandbox/hal_sio_lld.c
+++ b/os/hal/ports/sandbox/hal_sio_lld.c
@@ -448,14 +448,13 @@ msg_t sio_lld_control(SIODriver *siop, unsigned int operation, void *arg) {
  * @notapi
  */
 void sio_lld_serve_interrupt(SIODriver *siop) {
-  sioevents_t events, enabled;
+  sioevents_t events;
 
 #if SIO_USE_SYNCHRONIZATION == TRUE
   __syscall2rr(201, SB_VUART_GEVT, siop->nvuart);
   osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
 
   /* Only processing enabled events.*/
-  enabled = siop->enabled
   events = (sioevents_t)r1;
 
   /* Processing events, if any.*/
diff --git a/os/sb/vio/sbvio_uart.c b/os/sb/vio/sbvio_uart.c
index 627acbf74..622012c22 100644
--- a/os/sb/vio/sbvio_uart.c
+++ b/os/sb/vio/sbvio_uart.c
@@ -96,7 +96,7 @@ void sb_api_vio_uart(struct port_extctx *ectxp) {
       if (msg == HAL_RET_SUCCESS) {
 
         /* Starting with disabled events, enabling the callback.*/
-        sioWriteEnableFlags(unitp->siop, SIO_FL_NONE);
+        sioWriteEnableFlags(unitp->siop, SIO_EV_NONE);
         sioSetCallbackX(unitp->siop, vuart_cb);
       }
 
@@ -204,7 +204,7 @@ void sb_api_vio_uart(struct port_extctx *ectxp) {
     }
   case SB_VUART_WREN:
     {
-      sioflags_t flags = (sioflags_t)ectxp->r2;
+      sioevents_t flags = (sioevents_t)ectxp->r2;
 
       if (unitp->siop->state != SIO_READY) {
         ectxp->r0 = (uint32_t)CH_RET_EIO;