diff --git a/src/coap_io.c b/src/coap_io.c
index d9b825e3..c19b31f6 100644
--- a/src/coap_io.c
+++ b/src/coap_io.c
@@ -538,6 +538,7 @@ static __declspec(thread) LPFN_WSARECVMSG lpWSARecvMsg = NULL;
 #define iov_len_t size_t
 #endif
 
+#ifndef RIOT_VERSION
 ssize_t
 coap_network_send(coap_socket_t *sock, const coap_session_t *session, const uint8_t *data, size_t datalen) {
   ssize_t bytes_written = 0;
@@ -712,6 +713,7 @@ coap_network_send(coap_socket_t *sock, const coap_session_t *session, const uint
 
   return bytes_written;
 }
+#endif /* RIOT_VERSION */
 
 #define SIN6(A) ((struct sockaddr_in6 *)(A))
 
diff --git a/src/coap_io_riot.c b/src/coap_io_riot.c
index 2b06e1db..739f0d70 100644
--- a/src/coap_io_riot.c
+++ b/src/coap_io_riot.c
@@ -45,6 +45,29 @@
 #include "utlist.h"
 #include "resource.h"
 
+ssize_t
+coap_network_send(coap_socket_t *sock,
+                  const coap_session_t *session,
+                  const uint8_t *data,
+                  size_t datalen) {
+  ssize_t bytes_written = 0;
+
+  if (!coap_debug_send_packet()) {
+    bytes_written = (ssize_t)datalen;
+  } else if (sock->flags & COAP_SOCKET_CONNECTED) {
+    bytes_written = send(sock->fd, data, datalen, 0);
+  } else {
+    bytes_written = sendto(sock->fd, data, datalen, 0,
+                           &session->remote_addr.addr.sa,
+                           session->remote_addr.size);
+  }
+
+  if (bytes_written < 0)
+    coap_log(LOG_CRIT, "coap_network_send: %s\n", coap_socket_strerror());
+
+  return bytes_written;
+}
+
 ssize_t
 coap_network_read(coap_socket_t *sock, struct coap_packet_t *packet) {
   size_t len;