diff --git a/cpu/at32ap/at32ap700x/gpio.c b/cpu/at32ap/at32ap700x/gpio.c
index 2d53726b04..859124a91f 100644
--- a/cpu/at32ap/at32ap700x/gpio.c
+++ b/cpu/at32ap/at32ap700x/gpio.c
@@ -74,8 +74,8 @@ void gpio_enable_usart2(void)
 
 void gpio_enable_usart3(void)
 {
+	gpio_select_periph_B(GPIO_PIN_PB17, 0);
 	gpio_select_periph_B(GPIO_PIN_PB18, 0);
-	gpio_select_periph_B(GPIO_PIN_PB19, 0);
 }
 #endif