1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c
index 4ce3a41f1611..85cfa08d3bad 100644
--- a/drivers/serial/serial_lh7a40x.c
+++ b/drivers/serial/serial_lh7a40x.c
@@ -162,7 +162,7 @@ lh7a40xuart_rx_chars (struct uart_port* port)
                 flag = TTY_NORMAL;
                 ++port->icount.rx;
 
-                if (data & RxError) {   /* Quick check, short-circuit */
+                if (unlikely(data & RxError)) { /* Quick check, short-circuit */
                         if (data & RxBreak) {
                                 data &= ~(RxFramingError | RxParityError);
                                 ++port->icount.brk;