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-rw-r--r--ports/mimxrt10xx/common-hal/busio/UART.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/mimxrt10xx/common-hal/busio/UART.c b/ports/mimxrt10xx/common-hal/busio/UART.c
index 552844f32..ec0296156 100644
--- a/ports/mimxrt10xx/common-hal/busio/UART.c
+++ b/ports/mimxrt10xx/common-hal/busio/UART.c
@@ -216,7 +216,7 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
if (self->rx) {
self->uart = mcu_uart_banks[self->rx->bank_idx - 1];
} else {
- assert(self->rx);
+ assert(self->tx);
self->uart = mcu_uart_banks[self->tx->bank_idx - 1];
}