diff --git a/Server/Core/Commands/SurveillanceHandler.cs b/Server/Core/Commands/SurveillanceHandler.cs
index 53f73f98..e99078f3 100644
--- a/Server/Core/Commands/SurveillanceHandler.cs
+++ b/Server/Core/Commands/SurveillanceHandler.cs
@@ -62,7 +62,7 @@ public static void HandleGetProcessesResponse(Client client, GetProcessesRespons
                 {
                     if (packet.IDs[i] != 0 && packet.Processes[i] != "System.exe")
                     {
-                        if (client.Value.FrmTm == null)
+                        if (client.Value != null && client.Value.FrmTm != null)
                             break;
 
                         ListViewItem lvi =