diff --git a/net/mld/mld_timer.c b/net/mld/mld_timer.c
index da8f830010..9b98165ffa 100644
--- a/net/mld/mld_timer.c
+++ b/net/mld/mld_timer.c
@@ -115,7 +115,7 @@ static void mld_gendog_work(FAR void *arg)
    * index.
    */
 
-  ifindex = (int)arg;
+  ifindex = (intptr_t)arg;
   DEBUGASSERT(ifindex > 0);
 
   net_lock();
@@ -234,7 +234,7 @@ static void mld_v1dog_work(FAR void *arg)
    * index.
    */
 
-  ifindex = (int)arg;
+  ifindex = (intptr_t)arg;
   DEBUGASSERT(ifindex > 0);
 
   net_lock();
diff --git a/net/route/net_del_ramroute.c b/net/route/net_del_ramroute.c
index f50fcf882c..a6b334f879 100644
--- a/net/route/net_del_ramroute.c
+++ b/net/route/net_del_ramroute.c
@@ -90,7 +90,7 @@ static int net_match_ipv4(FAR struct net_route_ipv4_s *route, FAR void *arg)
 
   net_ipv4_dumproute("Comparing", route);
   ninfo("With:\n");
-  ninfo("  target=%08lx netmask=%08lx\n",
+  ninfo("  target=%08" PRIu32 " netmask=%08" PRIu32 "\n",
         HTONL(match->target), HTONL(match->netmask));
 
   if (net_ipv4addr_maskcmp(route->target, match->target, match->netmask) &&