diff --git a/contrib/zephyr/samples/server-client/main.c b/contrib/zephyr/samples/server-client/main.c
index 0c23e3835..c07d8ecc7 100644
--- a/contrib/zephyr/samples/server-client/main.c
+++ b/contrib/zephyr/samples/server-client/main.c
@@ -162,7 +162,7 @@ int main(void) {
 			.stopbits = 1,
 			.paritysetting = 0,
 		};
-		int error = csp_usart_open_and_add_kiss_interface(&conf, CSP_IF_KISS_DEFAULT_NAME,	&default_iface);
+		int error = csp_usart_open_and_add_kiss_interface(&conf, CSP_IF_KISS_DEFAULT_NAME, addr, &default_iface);
 		if (error != CSP_ERR_NONE) {
 			LOG_ERR("failed to add KISS interface [%s], error: %d", kiss_device, error);
 			exit(1);
diff --git a/examples/csp_client.c b/examples/csp_client.c
index 3d4c9353d..9ed61aa92 100644
--- a/examples/csp_client.c
+++ b/examples/csp_client.c
@@ -98,12 +98,11 @@ csp_iface_t * add_interface(enum DeviceType device_type, const char * device_nam
             .stopbits = 1,
             .paritysetting = 0,
 		};
-        int error = csp_usart_open_and_add_kiss_interface(&conf, CSP_IF_KISS_DEFAULT_NAME,  &default_iface);
+        int error = csp_usart_open_and_add_kiss_interface(&conf, CSP_IF_KISS_DEFAULT_NAME, client_address, &default_iface);
         if (error != CSP_ERR_NONE) {
             csp_print("failed to add KISS interface [%s], error: %d\n", device_name, error);
             exit(1);
         }
-		default_iface->addr = client_address;
         default_iface->is_default = 1;
     }
 
diff --git a/examples/csp_server.c b/examples/csp_server.c
index 18f85462d..e124c28dd 100644
--- a/examples/csp_server.c
+++ b/examples/csp_server.c
@@ -146,12 +146,11 @@ csp_iface_t * add_interface(enum DeviceType device_type, const char * device_nam
             .stopbits = 1,
             .paritysetting = 0,
 		};
-        int error = csp_usart_open_and_add_kiss_interface(&conf, CSP_IF_KISS_DEFAULT_NAME,  &default_iface);
+        int error = csp_usart_open_and_add_kiss_interface(&conf, CSP_IF_KISS_DEFAULT_NAME, server_address, &default_iface);
         if (error != CSP_ERR_NONE) {
             csp_print("failed to add KISS interface [%s], error: %d\n", device_name, error);
             exit(1);
         }
-		default_iface->addr = server_address;
         default_iface->is_default = 1;
     }
 
diff --git a/include/csp/drivers/usart.h b/include/csp/drivers/usart.h
index 57909614f..cb3247f85 100644
--- a/include/csp/drivers/usart.h
+++ b/include/csp/drivers/usart.h
@@ -82,10 +82,11 @@ void csp_usart_unlock(void * driver_data);
  *
  * @param[in] conf UART configuration.
  * @param[in] ifname internface name (will be copied), or use NULL for default name.
+ * @param[in] addr CSP address of the interface.
  * @param[out] return_iface the added interface.
  * @return #CSP_ERR_NONE on success, otherwise an error code.
  */
-int csp_usart_open_and_add_kiss_interface(const csp_usart_conf_t *conf, const char * ifname, csp_iface_t ** return_iface);
+int csp_usart_open_and_add_kiss_interface(const csp_usart_conf_t * conf, const char * ifname, uint16_t addr, csp_iface_t ** return_iface);
 
 #ifdef __cplusplus
 }
diff --git a/src/bindings/python/pycsp.c b/src/bindings/python/pycsp.c
index 51a77b6a8..5df198413 100644
--- a/src/bindings/python/pycsp.c
+++ b/src/bindings/python/pycsp.c
@@ -871,13 +871,14 @@ static PyObject * pycsp_kiss_init(PyObject * self, PyObject * args) {
 	char * device;
 	uint32_t baudrate = 500000;
 	uint32_t mtu = 512;
+	uint16_t addr = 0;
 	const char * if_name = CSP_IF_KISS_DEFAULT_NAME;
-	if (!PyArg_ParseTuple(args, "s|IIs", &device, &baudrate, &mtu, &if_name)) {
+	if (!PyArg_ParseTuple(args, "sH|IIs", &device, &addr, &baudrate, &mtu, &if_name)) {
 		return NULL;  // TypeError is thrown
 	}
 
 	csp_usart_conf_t conf = {.device = device, .baudrate = baudrate};
-	int res = csp_usart_open_and_add_kiss_interface(&conf, if_name, NULL);
+	int res = csp_usart_open_and_add_kiss_interface(&conf, if_name, addr, NULL);
 	if (res != CSP_ERR_NONE) {
 		return PyErr_Error("csp_usart_open_and_add_kiss_interface()", res);
 	}
diff --git a/src/csp_yaml.c b/src/csp_yaml.c
index 797eeb418..c7af1fb72 100644
--- a/src/csp_yaml.c
+++ b/src/csp_yaml.c
@@ -70,7 +70,7 @@ static void csp_yaml_end_if(struct data_s * data, unsigned int * dfl_addr) {
 			.stopbits = 1,
 			.paritysetting = 0,
 		};
-		int error = csp_usart_open_and_add_kiss_interface(&conf, data->name, &iface);
+		int error = csp_usart_open_and_add_kiss_interface(&conf, data->name, addr, &iface);
 		if (error != CSP_ERR_NONE) {
 			return;
 		}
diff --git a/src/drivers/usart/usart_kiss.c b/src/drivers/usart/usart_kiss.c
index 69fa2a684..59bc889c9 100644
--- a/src/drivers/usart/usart_kiss.c
+++ b/src/drivers/usart/usart_kiss.c
@@ -30,7 +30,7 @@ static void kiss_driver_rx(void * user_data, uint8_t * data, size_t data_size, v
 	csp_kiss_rx(&ctx->iface, data, data_size, pxTaskWoken);
 }
 
-int csp_usart_open_and_add_kiss_interface(const csp_usart_conf_t * conf, const char * ifname, csp_iface_t ** return_iface) {
+int csp_usart_open_and_add_kiss_interface(const csp_usart_conf_t * conf, const char * ifname, uint16_t addr, csp_iface_t ** return_iface) {
 
 	if (ifname == NULL) {
 		ifname = CSP_IF_KISS_DEFAULT_NAME;
@@ -43,6 +43,7 @@ int csp_usart_open_and_add_kiss_interface(const csp_usart_conf_t * conf, const c
 
 	strncpy(ctx->name, ifname, sizeof(ctx->name) - 1);
 	ctx->iface.name = ctx->name;
+	ctx->iface.addr = addr;
 	ctx->iface.driver_data = ctx;
 	ctx->iface.interface_data = &ctx->ifdata;
 	ctx->ifdata.tx_func = kiss_driver_tx;