diff --git a/drivers/net/cs89x0.c b/drivers/net/cs89x0.c
index f27c0a077d..4ccc95ee73 100644
--- a/drivers/net/cs89x0.c
+++ b/drivers/net/cs89x0.c
@@ -305,7 +305,8 @@ static int cs89x0_transmit(struct cs89x0_driver_s *cs89x0)
 
   /* Setup the TX timeout watchdog (perhaps restarting the timer) */
 
-  (void)wd_start(cs89x0->cs_txtimeout, CS89x0_TXTIMEOUT, cs89x0_txtimeout, 1, (uint32_t)cs89x0);
+  (void)wd_start(cs89x0->cs_txtimeout, CS89x0_TXTIMEOUT, cs89x0_txtimeout,
+                 1, (wdparm_t)cs89x0);
   return OK;
 }
 
@@ -793,7 +794,8 @@ static void cs89x0_polltimer(int argc, uint32_t arg, ...)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1, arg);
+  (void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1,
+                 (wdparm_t)arg);
 }
 
 /****************************************************************************
@@ -826,7 +828,8 @@ static int cs89x0_ifup(struct net_driver_s *dev)
 
   /* Set and activate a timer process */
 
-  (void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1, (uint32_t)cs89x0);
+  (void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1,
+                 (wdparm_t)cs89x0);
 
   /* Enable the Ethernet interrupt */
 
diff --git a/drivers/net/dm90x0.c b/drivers/net/dm90x0.c
index 37e49d3bae..aa3efbaf18 100644
--- a/drivers/net/dm90x0.c
+++ b/drivers/net/dm90x0.c
@@ -726,7 +726,8 @@ static int dm9x_transmit(struct dm9x_driver_s *dm9x)
 
       /* Setup the TX timeout watchdog (perhaps restarting the timer) */
 
-      (void)wd_start(dm9x->dm_txtimeout, DM6X_TXTIMEOUT, dm9x_txtimeout, 1, (uint32_t)dm9x);
+      (void)wd_start(dm9x->dm_txtimeout, DM6X_TXTIMEOUT, dm9x_txtimeout, 1,
+                     (wdparm_t)dm9x);
       return OK;
     }
   return -EBUSY;
@@ -1270,7 +1271,8 @@ static void dm9x_polltimer(int argc, uint32_t arg, ...)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(dm9x->dm_txpoll, DM6X_WDDELAY, dm9x_polltimer, 1, arg);
+  (void)wd_start(dm9x->dm_txpoll, DM6X_WDDELAY, dm9x_polltimer, 1,
+                 (wdparm_t)arg);
 }
 
 /****************************************************************************
@@ -1374,7 +1376,8 @@ static int dm9x_ifup(struct net_driver_s *dev)
 
   /* Set and activate a timer process */
 
-  (void)wd_start(dm9x->dm_txpoll, DM6X_WDDELAY, dm9x_polltimer, 1, (uint32_t)dm9x);
+  (void)wd_start(dm9x->dm_txpoll, DM6X_WDDELAY, dm9x_polltimer, 1,
+                 (wdparm_t)dm9x);
 
   /* Enable the DM9X interrupt */
 
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index cdc8f236e0..cf3b860aca 100644
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -453,7 +453,8 @@ static int e1000_transmit(struct e1000_dev *e1000)
 
   /* Setup the TX timeout watchdog (perhaps restarting the timer) */
 
-  wd_start(e1000->txtimeout, E1000_TXTIMEOUT, e1000_txtimeout, 1, (uint32_t)e1000);
+  wd_start(e1000->txtimeout, E1000_TXTIMEOUT, e1000_txtimeout, 1,
+           (wdparm_t)e1000);
   return OK;
 }
 
@@ -773,7 +774,8 @@ static void e1000_polltimer(int argc, uint32_t arg, ...)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1, arg);
+  (void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1,
+                 (wdparm_t)arg);
 }
 
 /****************************************************************************
@@ -807,7 +809,8 @@ static int e1000_ifup(struct net_driver_s *dev)
 
   /* Set and activate a timer process */
 
-  (void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1, (uint32_t)e1000);
+  (void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1,
+                 (wdparm_t)e1000);
 
   if (e1000_inl(e1000, E1000_STATUS) & 2)
     {
diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
index e1665ea86b..37f94b867f 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -1145,7 +1145,8 @@ static int enc_transmit(FAR struct enc_driver_s *priv)
    * the timer is started?
    */
 
-  (void)wd_start(priv->txtimeout, ENC_TXTIMEOUT, enc_txtimeout, 1, (uint32_t)priv);
+  (void)wd_start(priv->txtimeout, ENC_TXTIMEOUT, enc_txtimeout, 1,
+                 (wdparm_t)priv);
   return OK;
 }
 
@@ -1284,7 +1285,8 @@ static void enc_txif(FAR struct enc_driver_s *priv)
    * interrupted.
    */
 
-  (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, arg);
+  (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1,
+                 (wdparm_t)priv);
 
   /* Then poll uIP for new XMIT data */
 
@@ -1999,7 +2001,8 @@ static void enc_pollworker(FAR void *arg)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, arg);
+  (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1,
+                 (wdparm_t)arg);
 }
 
 /****************************************************************************
@@ -2097,7 +2100,8 @@ static int enc_ifup(struct net_driver_s *dev)
 
       /* Set and activate a timer process */
 
-      (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, (uint32_t)priv);
+      (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1,
+                     (wdparm_t)priv);
 
       /* Mark the interface up and enable the Ethernet interrupt at the
        * controller
diff --git a/drivers/net/encx24j600.c b/drivers/net/encx24j600.c
index baa18cc438..360684fbac 100644
--- a/drivers/net/encx24j600.c
+++ b/drivers/net/encx24j600.c
@@ -1057,7 +1057,7 @@ static int enc_transmit(FAR struct enc_driver_s *priv)
    */
 
   (void)wd_start(priv->txtimeout, ENC_TXTIMEOUT, enc_txtimeout, 1,
-                (uint32_t)priv);
+                 (wdparm_t)priv);
 
   /* free the descriptor */
 
@@ -1293,7 +1293,8 @@ static void enc_txif(FAR struct enc_driver_s *priv)
        * interrupted.
        */
 
-      (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, arg);
+      (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1,
+                     (wdparm_t)priv);
 
       /* Poll for TX packets from the networking layer */
 
@@ -2165,7 +2166,7 @@ static void enc_pollworker(FAR void *arg)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, arg);
+  (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, (wdparm_t)arg);
 }
 
 /****************************************************************************
@@ -2266,7 +2267,8 @@ static int enc_ifup(struct net_driver_s *dev)
 
       /* Set and activate a timer process */
 
-      (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1, (uint32_t)priv);
+      (void)wd_start(priv->txpoll, ENC_WDDELAY, enc_polltimer, 1,
+                     (wdparm_t)priv);
 
       /* Mark the interface up and enable the Ethernet interrupt at the
        * controller
diff --git a/drivers/net/ftmac100.c b/drivers/net/ftmac100.c
index 6a9f53ed13..6f40eee1e0 100644
--- a/drivers/net/ftmac100.c
+++ b/drivers/net/ftmac100.c
@@ -321,7 +321,7 @@ static int ftmac100_transmit(FAR struct ftmac100_driver_s *priv)
   /* Setup the TX timeout watchdog (perhaps restarting the timer) */
 
   (void)wd_start(priv->ft_txtimeout, FTMAC100_TXTIMEOUT,
-                 ftmac100_txtimeout_expiry, 1, (uint32_t)priv);
+                 ftmac100_txtimeout_expiry, 1, (wdparm_t)priv);
 
 //irqrestore(flags);
   return OK;
@@ -846,7 +846,8 @@ static void ftmac100_txdone(FAR struct ftmac100_driver_s *priv)
    * certain race conditions where the polling sequence can be interrupted.
    */
 
-  (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1, priv);
+  (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1,
+                 (wdparm_t)priv);
 
   /* Then poll uIP for new XMIT data */
 
@@ -1203,7 +1204,8 @@ static inline void ftmac100_poll_process(FAR struct ftmac100_driver_s *priv)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1, priv);
+  (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1,
+                 (wdparm_t)priv);
 }
 
 /****************************************************************************
@@ -1276,7 +1278,8 @@ static void ftmac100_poll_expiry(int argc, uint32_t arg, ...)
        * cycle.
        */
 
-      (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1, arg);
+      (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry,
+                     1, (wdparm_t)arg);
     }
 
 #else
@@ -1337,7 +1340,8 @@ static int ftmac100_ifup(struct net_driver_s *dev)
 
   /* Set and activate a timer process */
 
-  (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1, (uint32_t)priv);
+  (void)wd_start(priv->ft_txpoll, FTMAC100_WDDELAY, ftmac100_poll_expiry, 1,
+                 (wdparm_t)priv);
 
   /* Enable the Ethernet interrupt */
 
diff --git a/drivers/net/vnet.c b/drivers/net/vnet.c
index e57b654a9d..06df87098b 100644
--- a/drivers/net/vnet.c
+++ b/drivers/net/vnet.c
@@ -521,7 +521,8 @@ static void vnet_polltimer(int argc, uint32_t arg, ...)
 
   /* Setup the watchdog poll timer again */
 
-  (void)wd_start(vnet->sk_txpoll, VNET_WDDELAY, vnet_polltimer, 1, arg);
+  (void)wd_start(vnet->sk_txpoll, VNET_WDDELAY, vnet_polltimer, 1,
+                 (wdparm_t)arg);
 }
 
 /****************************************************************************
@@ -553,7 +554,8 @@ static int vnet_ifup(struct net_driver_s *dev)
 
   /* Set and activate a timer process */
 
-  (void)wd_start(vnet->sk_txpoll, VNET_WDDELAY, vnet_polltimer, 1, (uint32_t)vnet);
+  (void)wd_start(vnet->sk_txpoll, VNET_WDDELAY, vnet_polltimer, 1,
+                 (wdparm_t)vnet);
 
   vnet->sk_bifup = true;
   return OK;