diff --git a/arch/arm/src/cxd56xx/cxd56_rtc.c b/arch/arm/src/cxd56xx/cxd56_rtc.c
index e769af8b214..73151222b20 100644
--- a/arch/arm/src/cxd56xx/cxd56_rtc.c
+++ b/arch/arm/src/cxd56xx/cxd56_rtc.c
@@ -355,7 +355,7 @@ static void cxd56_rtc_initialize(wdparm_t arg)
 
 int up_rtc_initialize(void)
 {
-  cxd56_rtc_initialize(1, NULL);
+  cxd56_rtc_initialize(0);
   return OK;
 }
 
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 272c274e1f3..2009dc4d252 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -834,7 +834,7 @@ static void tun_poll_work(FAR void *arg)
  *
  ****************************************************************************/
 
-static void tun_poll_expiry(FAR void *arg)
+static void tun_poll_expiry(wdparm_t arg)
 {
   FAR struct tun_device_s *priv = (FAR struct tun_device_s *)arg;
 
@@ -878,7 +878,7 @@ static int tun_ifup(FAR struct net_driver_s *dev)
 
   /* Set and activate a timer process */
 
-  wd_start(&priv->txpoll, TUN_WDDELAY, tun_poll_expiry, priv);
+  wd_start(&priv->txpoll, TUN_WDDELAY, tun_poll_expiry, (wdparm_t)priv);
 
   priv->bifup = true;
   return OK;