diff --git a/boards/particle-xenon/include/periph_conf.h b/boards/particle-xenon/include/periph_conf.h
index 57762e0d80..f0ff0e8698 100644
--- a/boards/particle-xenon/include/periph_conf.h
+++ b/boards/particle-xenon/include/periph_conf.h
@@ -42,9 +42,20 @@ static const uart_conf_t uart_config[] = {
 #endif
         .irqn       = UARTE0_UART0_IRQn,
     },
+    {
+        .dev        = NRF_UARTE1,
+        .rx_pin     = GPIO_PIN(1,10),
+        .tx_pin     = GPIO_PIN(1,8),
+#ifdef MODULE_PERIPH_UART_HW_FC
+        .rts_pin    = GPIO_PIN(1,3),
+        .cts_pin    = GPIO_PIN(1,11),
+#endif
+        .irqn       = UARTE1_IRQn,
+    },
 };
 
 #define UART_0_ISR          (isr_uart0)
+#define UART_1_ISR          (isr_uarte1)
 
 #define UART_NUMOF          ARRAY_SIZE(uart_config)
 /** @} */