diff --git a/src/redir.c b/src/redir.c
index b5dbde34..05a3671a 100644
--- a/src/redir.c
+++ b/src/redir.c
@@ -147,10 +147,6 @@ int create_and_bind(const char *addr, const char *port)
             LOGI("tcp port reuse enabled");
         }
 
-        // Set QoS flag
-        int tos = 46;
-        setsockopt(remotefd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))
-
         s = bind(listen_sock, rp->ai_addr, rp->ai_addrlen);
         if (s == 0) {
             /* We managed to bind successfully! */
@@ -647,10 +643,6 @@ static void accept_cb(EV_P_ ev_io *w, int revents)
     setsockopt(remotefd, SOL_TCP, TCP_KEEPINTVL, (void *)&keepInterval, sizeof(keepInterval));
     setsockopt(remotefd, SOL_TCP, TCP_KEEPCNT, (void *)&keepCount, sizeof(keepCount));
 
-    // Set QoS flag
-    int tos = 46;
-    setsockopt(remotefd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))
-
     // Set non blocking
     setnonblocking(remotefd);
 
diff --git a/src/udprelay.c b/src/udprelay.c
index 67e80767..f91017c2 100644
--- a/src/udprelay.c
+++ b/src/udprelay.c
@@ -429,6 +429,11 @@ int create_server_socket(const char *host, const char *port)
         if (err == 0) {
             LOGI("udp port reuse enabled");
         }
+#ifdef IP_TOS
+        // Set QoS flag
+        int tos = 46;
+        setsockopt(server_sock, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+#endif
 
 #ifdef MODULE_REDIR
         if (setsockopt(server_sock, SOL_IP, IP_TRANSPARENT, &opt, sizeof(opt))) {
@@ -574,6 +579,11 @@ static void query_resolve_cb(struct sockaddr *addr, void *data)
 #ifdef SO_NOSIGPIPE
                 set_nosigpipe(remotefd);
 #endif
+#ifdef IP_TOS
+                // Set QoS flag
+                int tos = 46;
+                setsockopt(remotefd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+#endif
 #ifdef SET_INTERFACE
                 if (query_ctx->server_ctx->iface) {
                     if (setinterface(remotefd, query_ctx->server_ctx->iface) == -1)
@@ -756,6 +766,11 @@ static void remote_recv_cb(EV_P_ ev_io *w, int revents)
         close(src_fd);
         goto CLEAN_UP;
     }
+#ifdef IP_TOS
+    // Set QoS flag
+    int tos = 46;
+    setsockopt(src_fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+#endif
     if (bind(src_fd, (struct sockaddr *)&dst_addr, remote_dst_addr_len) != 0) {
         ERROR("[udp] remote_recv_bind");
         close(src_fd);
@@ -1079,6 +1094,11 @@ static void server_recv_cb(EV_P_ ev_io *w, int revents)
 #ifdef SO_NOSIGPIPE
         set_nosigpipe(remotefd);
 #endif
+#ifdef IP_TOS
+        // Set QoS flag
+        int tos = 46;
+        setsockopt(remotefd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+#endif
 #ifdef SET_INTERFACE
         if (server_ctx->iface) {
             if (setinterface(remotefd, server_ctx->iface) == -1)
@@ -1170,6 +1190,11 @@ static void server_recv_cb(EV_P_ ev_io *w, int revents)
 #ifdef SO_NOSIGPIPE
                 set_nosigpipe(remotefd);
 #endif
+#ifdef IP_TOS
+                // Set QoS flag
+                int tos = 46;
+                setsockopt(remotefd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+#endif
 #ifdef SET_INTERFACE
                 if (server_ctx->iface) {
                     if (setinterface(remotefd, server_ctx->iface) == -1)