diff --git a/src/components/IndividualClientPage.tsx b/src/components/IndividualClientPage.tsx
index 588435f..234806a 100644
--- a/src/components/IndividualClientPage.tsx
+++ b/src/components/IndividualClientPage.tsx
@@ -150,14 +150,15 @@ const IndividualClientPage: React.FC<IndividualClientPageProps> = ({ clientId, t
           "system_id": selectedSystem
         });
       } else if (action === "join") {
-        if (!payloadData?.server_id || !payloadData?.channel_id) {
+        if (!payloadData?.server_id || !payloadData?.channel_id || !selectedSystem) {
           setError("Please provide both Discord Server ID and Channel ID.");
           setLoading(false);
           return;
         }
         httpOptions.body = JSON.stringify({
           "guild_id": payloadData.server_id,
-          "channel_id": payloadData.channel_id
+          "channel_id": payloadData.channel_id,
+          "system_id": selectedSystem
         });
       } else if (action === "leave") {
         if (!payloadData?.guild_id) {
@@ -335,9 +336,24 @@ const IndividualClientPage: React.FC<IndividualClientPageProps> = ({ clientId, t
                 placeholder="Enter Discord Channel ID"
               />
             </div>
+            <div className="grid grid-cols-4 items-center gap-4">
+              <Label htmlFor="system-select" className="text-right">Select System</Label>
+              <Select onValueChange={setSelectedSystem} value={selectedSystem || ''}>
+                <SelectTrigger className="col-span-3">
+                  <SelectValue placeholder="Choose a system" />
+                </SelectTrigger>
+                <SelectContent>
+                  {availableSystems.map((system) => (
+                    <SelectItem key={system._id} value={system._id}>
+                      {system.name} ({system._id})
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
           </div>
           <DialogFooter>
-            <Button onClick={handleConfirmJoin} disabled={!discordServerId || !discordChannelId || loading || !token}>
+            <Button onClick={handleConfirmJoin} disabled={!discordServerId || !discordChannelId || !selectedSystem || loading || !token}>
               {loading ? 'Joining...' : 'Confirm Join'}
             </Button>
             <Button variant="outline" onClick={() => setIsJoinDiscordDialogOpen(false)}>