diff --git a/boards/hifive1b/include/periph_conf.h b/boards/hifive1b/include/periph_conf.h
index fb1ab80388..c611a17f26 100644
--- a/boards/hifive1b/include/periph_conf.h
+++ b/boards/hifive1b/include/periph_conf.h
@@ -51,8 +51,8 @@ static const uart_conf_t uart_config[] = {
     },
     {
         .addr       = UART1_CTRL_ADDR,
-        .rx         = GPIO_PIN(0, 18),
-        .tx         = GPIO_PIN(0, 23),
+        .rx         = GPIO_PIN(0, 23),
+        .tx         = GPIO_PIN(0, 18),
         .isr_num    = INT_UART1_BASE,
     },
 };