diff --git a/reactos/lib/3rdparty/adns/src/check.c b/reactos/lib/3rdparty/adns/src/check.c
index 211f6c6cff9..74703cab103 100644
--- a/reactos/lib/3rdparty/adns/src/check.c
+++ b/reactos/lib/3rdparty/adns/src/check.c
@@ -102,7 +102,7 @@ static void checkc_notcpbuf(adns_state ads) {
 static void checkc_global(adns_state ads) {
   int i;
   
-  assert(ads->udpsocket >= 0);
+  assert(ads->udpsocket != INVALID_SOCKET);
 
   for (i=0; i<ads->nsortlist; i++)
     assert(!(ads->sortlist[i].base.s_addr & ~ads->sortlist[i].mask.s_addr));
@@ -111,7 +111,7 @@ static void checkc_global(adns_state ads) {
   
   switch (ads->tcpstate) {
   case server_connecting:
-    assert(ads->tcpsocket >= 0);
+    assert(ads->tcpsocket != INVALID_SOCKET);
     checkc_notcpbuf(ads);
     break;
   case server_disconnected:
@@ -120,7 +120,7 @@ static void checkc_global(adns_state ads) {
     checkc_notcpbuf(ads);
     break;
   case server_ok:
-    assert(ads->tcpsocket >= 0);
+    assert(ads->tcpsocket != INVALID_SOCKET);
     assert(ads->tcprecv_skip <= ads->tcprecv.used);
     break;
   default:
diff --git a/reactos/lib/3rdparty/adns/src/event.c b/reactos/lib/3rdparty/adns/src/event.c
index 4dd61f54d8f..cd34ff9ceab 100644
--- a/reactos/lib/3rdparty/adns/src/event.c
+++ b/reactos/lib/3rdparty/adns/src/event.c
@@ -114,7 +114,7 @@ void adns__tcp_tryconnect(adns_state ads, struct timeval now) {
 	ADNS_CLEAR_ERRNO
     fd= socket(AF_INET,SOCK_STREAM,proto->p_proto);
 	ADNS_CAPTURE_ERRNO;
-    if (fd<0) {
+    if (fd == INVALID_SOCKET) {
       adns__diag(ads,-1,0,"cannot create TCP socket: %s",strerror(errno));
       return;
     }
diff --git a/reactos/lib/3rdparty/adns/src/general.c b/reactos/lib/3rdparty/adns/src/general.c
index 4d24fda8ba6..1b61686d79f 100644
--- a/reactos/lib/3rdparty/adns/src/general.c
+++ b/reactos/lib/3rdparty/adns/src/general.c
@@ -254,7 +254,7 @@ static const struct sinfo {
   SINFO(  nodata,              "No such data"                                  )
 };
 
-static int si_compar(const void *key, const void *elem) {
+static int __cdecl si_compar(const void *key, const void *elem) {
   const adns_status *st= key;
   const struct sinfo *si= elem;
 
@@ -295,7 +295,7 @@ static const struct stinfo {
   STINFO(  permfail    )
 };
 
-static int sti_compar(const void *key, const void *elem) {
+static int __cdecl sti_compar(const void *key, const void *elem) {
   const adns_status *st= key;
   const struct stinfo *sti= elem;
 
diff --git a/reactos/lib/3rdparty/adns/src/setup.c b/reactos/lib/3rdparty/adns/src/setup.c
index 3b8a26a67a7..3995d3cba00 100644
--- a/reactos/lib/3rdparty/adns/src/setup.c
+++ b/reactos/lib/3rdparty/adns/src/setup.c
@@ -536,7 +536,7 @@ static int init_finish(adns_state ads) {
   ADNS_CLEAR_ERRNO;
   ads->udpsocket= socket(AF_INET,SOCK_DGRAM,proto->p_proto);
   ADNS_CAPTURE_ERRNO;
-  if (ads->udpsocket<0) { r= errno; goto x_free; }
+  if (ads->udpsocket == INVALID_SOCKET) { r= errno; goto x_free; }
 
   r= adns__setnonblock(ads,ads->udpsocket);
   if (r) { r= errno; goto x_closeudp; }
@@ -682,7 +682,7 @@ void adns_finish(adns_state ads) {
     else break;
   }
   adns_socket_close(ads->udpsocket);
-  if (ads->tcpsocket >= 0) adns_socket_close(ads->tcpsocket);
+  if (ads->tcpsocket != INVALID_SOCKET) adns_socket_close(ads->tcpsocket);
   adns__vbuf_free(&ads->tcpsend);
   adns__vbuf_free(&ads->tcprecv);
   freesearchlist(ads);