diff --git a/drivers/include/soft_uart.h b/drivers/include/soft_uart.h
index f2f30fc17d..032ae4099b 100644
--- a/drivers/include/soft_uart.h
+++ b/drivers/include/soft_uart.h
@@ -37,6 +37,16 @@
 extern "C" {
 #endif
 
+/**
+ * @brief invert the level of the TX signal
+ */
+#define SOFT_UART_FLAG_INVERT_TX    0x1
+
+/**
+ * @brief invert the level of the RX signal
+ */
+#define SOFT_UART_FLAG_INVERT_RX    0x2
+
 /**
  * @brief Software UART port descriptor
  */
@@ -47,6 +57,7 @@ typedef struct {
     tim_t tx_timer;         /**< Hardware timer used for TX */
     uint32_t timer_freq;    /**< Operating frequency of the timer.
                                  Should be a multiple of baudrate */
+    uint8_t flags;          /**< Soft UART flags */
 } soft_uart_conf_t;
 
 /**
diff --git a/drivers/soft_uart/include/soft_uart_params.h b/drivers/soft_uart/include/soft_uart_params.h
index 3de62ccda3..2134a445ec 100644
--- a/drivers/soft_uart/include/soft_uart_params.h
+++ b/drivers/soft_uart/include/soft_uart_params.h
@@ -41,13 +41,18 @@ extern "C" {
 #ifndef SOFT_UART_PARAM_FREQ
 #define SOFT_UART_PARAM_FREQ        MHZ(1)
 #endif
+#ifndef SOFT_UART_PARAM_FLAGS
+#define SOFT_UART_PARAM_FLAGS       (0)
+#endif
 
 #ifndef SOFT_UART_PARAMS
 #define SOFT_UART_PARAMS     { .rx_pin = SOFT_UART_PARAM_RX,    \
                                .tx_pin = SOFT_UART_PARAM_TX,    \
                                .rx_timer = SOFT_UART_PARAM_TIMER_RX, \
                                .tx_timer = SOFT_UART_PARAM_TIMER_TX, \
-                               .timer_freq = SOFT_UART_PARAM_FREQ }
+                               .timer_freq = SOFT_UART_PARAM_FREQ, \
+                               .flags = SOFT_UART_PARAM_FLAGS, \
+                             }
 #endif
 
 /**