diff --git a/src/anchor.c b/src/anchor.c
index 6872ab18..a5a31b2e 100644
--- a/src/anchor.c
+++ b/src/anchor.c
@@ -50,6 +50,7 @@
 #include "gldns/keyraw.h"
 #include "general.h"
 #include "util-internal.h"
+#include "platform.h"
 
 /* get key usage out of its extension, returns 0 if no key_usage extension */
 static unsigned long
diff --git a/src/context.c b/src/context.c
index 9b43ff76..3456bfa0 100644
--- a/src/context.c
+++ b/src/context.c
@@ -80,6 +80,7 @@ typedef unsigned short in_port_t;
 #include "context.h"
 #include "types-internal.h"
 #include "util-internal.h"
+#include "platform.h"
 #include "dnssec.h"
 #include "stub.h"
 #include "list.h"
diff --git a/src/extension/poll_eventloop.c b/src/extension/poll_eventloop.c
index b0793e7c..7d6bb99c 100644
--- a/src/extension/poll_eventloop.c
+++ b/src/extension/poll_eventloop.c
@@ -28,6 +28,7 @@
 #include "config.h"
 
 #include "util-internal.h"
+#include "platform.h"
 #ifdef HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
 #endif
@@ -406,7 +407,7 @@ poll_eventloop_run_once(getdns_eventloop *loop, int blocking)
         Sleep(poll_timeout);
     } else
 #endif
-	if (poll(poll_loop->pfds, poll_loop->fd_events_free, poll_timeout) < 0) {
+	if (_getdns_poll(poll_loop->pfds, poll_loop->fd_events_free, poll_timeout) < 0) {
 		perror("poll() failed");
 		exit(EXIT_FAILURE);
 	}
diff --git a/src/mdns.c b/src/mdns.c
index 7578a262..30bdab6e 100644
--- a/src/mdns.c
+++ b/src/mdns.c
@@ -26,6 +26,7 @@
 #include "gldns/pkthdr.h"
 #include "gldns/rrdef.h"
 #include "util-internal.h"
+#include "platform.h"
 #include "mdns.h"
 
 #ifdef HAVE_MDNS_SUPPORT
diff --git a/src/mdns.h b/src/mdns.h
index e53f79a1..79ec05fe 100644
--- a/src/mdns.h
+++ b/src/mdns.h
@@ -25,6 +25,7 @@
 #include "getdns/getdns.h"
 #include "types-internal.h"
 #include "util-internal.h"
+#include "platform.h"
 #include "util/lruhash.h"
 #include "config.h"
 
diff --git a/src/platform.h b/src/platform.h
new file mode 100644
index 00000000..0cd4c9f6
--- /dev/null
+++ b/src/platform.h
@@ -0,0 +1,81 @@
+/**
+ *
+ * /brief general functions with platform-dependent implementations
+ *
+ */
+
+/*
+ * Copyright (c) 2017, NLnet Labs, Sinodun
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the names of the copyright holders nor the
+ *   names of its contributors may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef PLATFORM_H
+#define PLATFORM_H
+
+#include "config.h"
+
+#ifdef USE_WINSOCK
+typedef u_short sa_family_t;
+#define _getdns_EAGAIN      (WSATRY_AGAIN)
+#define _getdns_EWOULDBLOCK (WSAEWOULDBLOCK)
+#define _getdns_EINPROGRESS (WSAEINPROGRESS)
+#define _getdns_EMFILE      (WSAEMFILE)
+#define _getdns_ECONNRESET  (WSAECONNRESET)
+
+#define _getdns_closesocket(fd) closesocket(fd)
+#define _getdns_poll(fdarray, nsockets, timer) WSAPoll(fdarray, nsockets, timer)
+#define _getdns_socketerror() (WSAGetLastError())
+
+#else /* USE_WINSOCK */
+
+#ifdef HAVE_SYS_POLL_H
+# include <sys/poll.h>
+#else
+# include <poll.h>
+#endif
+
+#define _getdns_EAGAIN      (EAGAIN)
+#define _getdns_EWOULDBLOCK (EWOULDBLOCK)
+#define _getdns_EINPROGRESS (EINPROGRESS)
+#define _getdns_EMFILE      (EMFILE)
+#define _getdns_ECONNRESET  (ECONNRESET)
+
+#define SOCKADDR struct sockaddr
+#define SOCKADDR_IN struct sockaddr_in
+#define SOCKADDR_IN6 struct sockaddr_in6
+#define SOCKADDR_STORAGE struct sockaddr_storage
+#define SOCKET int
+
+#define IP_MREQ struct ip_mreq
+#define IPV6_MREQ struct ipv6_mreq
+#define BOOL int
+#define TRUE 1
+
+#define _getdns_closesocket(fd) close(fd)
+#define _getdns_poll(fdarray, nsockets, timer) poll(fdarray, nsockets, timer)
+#define _getdns_socketerror() (errno)
+#endif
+
+#endif
diff --git a/src/server.c b/src/server.c
index 319991da..f29cb603 100644
--- a/src/server.c
+++ b/src/server.c
@@ -40,6 +40,7 @@
 #include "debug.h"
 #include "util/rbtree.h"
 #include "util-internal.h"
+#include "platform.h"
 #include "server.h"
 
 #define DNS_REQUEST_SZ          4096
diff --git a/src/stub.c b/src/stub.c
index 5d472f72..ebcb2527 100644
--- a/src/stub.c
+++ b/src/stub.c
@@ -52,6 +52,7 @@
 #include "rr-iter.h"
 #include "context.h"
 #include "util-internal.h"
+#include "platform.h"
 #include "general.h"
 #include "pubkey-pinning.h"
 
diff --git a/src/util-internal.h b/src/util-internal.h
index faab07b0..3d768de1 100644
--- a/src/util-internal.h
+++ b/src/util-internal.h
@@ -218,46 +218,5 @@ INLINE uint64_t _getdns_ms_until_expiry2(uint64_t expires, uint64_t *now_ms)
 	return *now_ms >= expires ? 0 : expires - *now_ms;
 }
 
-
-#ifdef USE_WINSOCK
-typedef u_short sa_family_t;
-#define _getdns_EAGAIN      (WSATRY_AGAIN)
-#define _getdns_EWOULDBLOCK (WSAEWOULDBLOCK)
-#define _getdns_EINPROGRESS (WSAEINPROGRESS)
-#define _getdns_EMFILE      (WSAEMFILE)
-#define _getdns_ECONNRESET  (WSAECONNRESET)
-
-#define _getdns_closesocket(fd) closesocket(fd)
-#define _getdns_poll(fdarray, nsockets, timer) WSAPoll(fdarray, nsockets, timer)
-#define _getdns_socketerror() (WSAGetLastError())
-#else
-#ifdef HAVE_SYS_POLL_H
-# include <sys/poll.h>
-#else
-# include <poll.h>
-#endif
-
-#define _getdns_EAGAIN      (EAGAIN)
-#define _getdns_EWOULDBLOCK (EWOULDBLOCK)
-#define _getdns_EINPROGRESS (EINPROGRESS)
-#define _getdns_EMFILE      (EMFILE)
-#define _getdns_ECONNRESET  (ECONNRESET)
-
-#define SOCKADDR struct sockaddr
-#define SOCKADDR_IN struct sockaddr_in
-#define SOCKADDR_IN6 struct sockaddr_in6
-#define SOCKADDR_STORAGE struct sockaddr_storage
-#define SOCKET int
-
-#define IP_MREQ struct ip_mreq
-#define IPV6_MREQ struct ipv6_mreq
-#define BOOL int
-#define TRUE 1
-
-#define _getdns_closesocket(fd) close(fd)
-#define _getdns_poll(fdarray, nsockets, timer) poll(fdarray, nsockets, timer)
-#define _getdns_socketerror() (errno)
-#endif
-
 #endif
 /* util-internal.h */