diff --git a/src/config.c b/src/config.c
index 4455f4ae4..52eb05dae 100644
--- a/src/config.c
+++ b/src/config.c
@@ -887,7 +887,9 @@ load_network(void)
             strcpy(nc->host_dev_name, "none");
 
         sprintf(temp, "net_%02i_switch_group", c + 1);
-        nc->switch_group = ini_section_get_int(cat, temp, 0);
+        nc->switch_group = ini_section_get_int(cat, temp, NET_SWITCH_GRP_MIN);
+        if (nc->switch_group < NET_SWITCH_GRP_MIN)
+            nc->switch_group = NET_SWITCH_GRP_MIN;
 
         sprintf(temp, "net_%02i_promisc", c + 1);
         nc->promisc_mode = ini_section_get_int(cat, temp, 0);
@@ -2986,7 +2988,7 @@ save_network(void)
             ini_section_set_int(cat, temp, nc->link_state);
 
         sprintf(temp, "net_%02i_switch_group", c + 1);
-        if (nc->switch_group == 0)
+        if (nc->switch_group == NET_SWITCH_GRP_MIN)
             ini_section_delete_var(cat, temp);
         else
             ini_section_set_int(cat, temp, nc->switch_group);
diff --git a/src/include/86box/network.h b/src/include/86box/network.h
index cad7b9128..0642c3f53 100644
--- a/src/include/86box/network.h
+++ b/src/include/86box/network.h
@@ -60,6 +60,8 @@
 #define NET_QUEUE_COUNT    4
 #define NET_CARD_MAX       4
 #define NET_HOST_INTF_MAX  64
+#define NET_SWITCH_GRP_MIN 1
+#define NET_SWITCH_GRP_MAX 10
 
 #define NET_PERIOD_10M     0.8
 #define NET_PERIOD_100M    0.08
diff --git a/src/network/net_switch.c b/src/network/net_switch.c
index 2f24735d3..5fc3a2091 100644
--- a/src/network/net_switch.c
+++ b/src/network/net_switch.c
@@ -469,7 +469,7 @@ net_switch_init(const netcard_t *card, const uint8_t *mac_addr, void *priv, char
     val = 0;
     setsockopt(netswitch->socket_rx, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &val, sizeof(val));
 
-    netswitch->port_out = htons(SWITCH_MULTICAST_PORT + netcard->switch_group);
+    netswitch->port_out = htons(SWITCH_MULTICAST_PORT - NET_SWITCH_GRP_MIN + netcard->switch_group);
     struct sockaddr_in addr = {
         .sin_family = AF_INET,
         .sin_addr = { .s_addr = htonl(INADDR_ANY) },
diff --git a/src/qt/qt_settingsnetwork.cpp b/src/qt/qt_settingsnetwork.cpp
index 929781075..878944e60 100644
--- a/src/qt/qt_settingsnetwork.cpp
+++ b/src/qt/qt_settingsnetwork.cpp
@@ -54,8 +54,8 @@ SettingsNetwork::enableElements(Ui::SettingsNetwork *ui)
         // auto *switch_group_hlayout = findChild<QHBoxLayout *>(QString("HLayoutSwitch%1").arg(i + 1));
         // auto *switch_group_hspacer = findChild<QWidget *>(QString("horizontalSpacerSwitch%1").arg(i + 1));
         auto *switch_group_value = findChild<QSpinBox *>(QString("spinnerSwitch%1").arg(i + 1));
-        switch_group_value->setMinimum(1);
-        switch_group_value->setMaximum(10);
+        switch_group_value->setMinimum(NET_SWITCH_GRP_MIN);
+        switch_group_value->setMaximum(NET_SWITCH_GRP_MAX);
 
         // Promiscuous option
         auto *promisc_label = findChild<QLabel *>(QString("labelPromisc%1").arg(i + 1));
@@ -230,10 +230,10 @@ SettingsNetwork::save()
         else if (net_cards_conf[i].net_type == NET_TYPE_NRSWITCH) {
             memset(net_cards_conf[i].nrs_hostname, '\0', sizeof(net_cards_conf[i].nrs_hostname));
             strncpy(net_cards_conf[i].nrs_hostname, hostname_value->text().toUtf8().constData(), sizeof(net_cards_conf[i].nrs_hostname) - 1);
-            net_cards_conf[i].switch_group = switch_group_value->value() - 1;
+            net_cards_conf[i].switch_group = switch_group_value->value();
         } else if (net_cards_conf[i].net_type == NET_TYPE_NLSWITCH) {
             net_cards_conf[i].promisc_mode = promisc_value->isChecked();
-            net_cards_conf[i].switch_group = switch_group_value->value() - 1;
+            net_cards_conf[i].switch_group = switch_group_value->value();
         }
     }
 }
@@ -350,12 +350,12 @@ SettingsNetwork::onCurrentMachineChanged(int machineId)
             auto *promisc_value = findChild<QCheckBox *>(QString("boxPromisc%1").arg(i + 1));
             promisc_value->setCheckState(net_cards_conf[i].promisc_mode == 1 ? Qt::CheckState::Checked : Qt::CheckState::Unchecked);
             auto *switch_group_value = findChild<QSpinBox *>(QString("spinnerSwitch%1").arg(i + 1));
-            switch_group_value->setValue(net_cards_conf[i].switch_group + 1);
+            switch_group_value->setValue(net_cards_conf[i].switch_group);
         } else if (net_cards_conf[i].net_type == NET_TYPE_NRSWITCH) {
             auto *hostname_value = findChild<QLineEdit *>(QString("hostnameSwitch%1").arg(i + 1));
             hostname_value->setText(net_cards_conf[i].nrs_hostname);
             auto *switch_group_value = findChild<QSpinBox *>(QString("spinnerSwitch%1").arg(i + 1));
-            switch_group_value->setValue(net_cards_conf[i].switch_group + 1);
+            switch_group_value->setValue(net_cards_conf[i].switch_group);
         }
     }
 }