diff --git a/src/io_posix.c b/src/io_posix.c
index 33517354..74aed173 100644
--- a/src/io_posix.c
+++ b/src/io_posix.c
@@ -104,6 +104,8 @@ udx__on_writable (udx_socket_t *socket) {
 #ifdef UDX_PLATFORM_HAS_SENDMMSG
   bool finished = false;
 
+  assert((socket->status & UDX_SOCKET_CLOSING_HANDLES) == 0);
+
   while (!finished) {
     udx_packet_t *batch[UDX_SENDMMSG_BATCH_SIZE];
     struct mmsghdr h[UDX_SENDMMSG_BATCH_SIZE];
@@ -180,7 +182,7 @@ udx__on_writable (udx_socket_t *socket) {
       udx__confirm_packet(batch[i]);
     }
 
-    if (rc == UV_EAGAIN) {
+    if (rc == UV_EAGAIN || socket->status & UDX_SOCKET_CLOSING_HANDLES) {
       finished = true;
     }
   }
@@ -209,6 +211,9 @@ udx__on_writable (udx_socket_t *socket) {
     // todo: set in confirm packet with uv_now()
     pkt->time_sent = uv_now(socket->udx->loop);
     udx__confirm_packet(pkt);
+    if (socket->status & UDX_SOCKET_CLOSING_HANDLES) {
+      break;
+    }
   }
 #endif
 }
diff --git a/src/io_win.c b/src/io_win.c
index a9e8f75b..a541156b 100644
--- a/src/io_win.c
+++ b/src/io_win.c
@@ -85,6 +85,7 @@ udx__recvmsg (udx_socket_t *socket, uv_buf_t *buf, struct sockaddr *addr, int ad
 
 void
 udx__on_writable (udx_socket_t *socket) {
+  assert((socket->status & UDX_SOCKET_CLOSING_HANDLES) == 0);
   while (true) {
     udx_packet_t *pkt = udx__shift_packet(socket);
     if (pkt == NULL) break;
@@ -108,5 +109,8 @@ udx__on_writable (udx_socket_t *socket) {
     }
     pkt->time_sent = uv_now(socket->udx->loop);
     udx__confirm_packet(pkt);
+    if (socket->status & UDX_SOCKET_CLOSING_HANDLES) {
+      break;
+    }
   }
 }
diff --git a/src/udx.c b/src/udx.c
index 365ec0a8..01b13840 100644
--- a/src/udx.c
+++ b/src/udx.c
@@ -1598,7 +1598,7 @@ on_uv_poll (uv_poll_t *handle, int status, int events) {
     buf.base = (char *) &b;
     buf.len = 2048;
 
-    while ((size = udx__recvmsg(socket, &buf, (struct sockaddr *) &addr, addr_len)) >= 0) {
+    while (!(socket->status & UDX_SOCKET_CLOSING_HANDLES) && (size = udx__recvmsg(socket, &buf, (struct sockaddr *) &addr, addr_len)) >= 0) {
       if (!process_packet(socket, b, size, (struct sockaddr *) &addr) && socket->on_recv != NULL) {
         buf.len = size;
 
@@ -1613,7 +1613,7 @@ on_uv_poll (uv_poll_t *handle, int status, int events) {
     }
   }
 
-  if (events & UV_WRITABLE) {
+  if (events & UV_WRITABLE && !(socket->status & UDX_SOCKET_CLOSING_HANDLES)) {
     if (events & UV_READABLE) {
       // compensate for potentially long-running read callbacks
       uv_update_time(handle->loop);