diff --git a/renderdocui/Windows/MainWindow.cs b/renderdocui/Windows/MainWindow.cs
index 42930f2eb..b90a707ab 100644
--- a/renderdocui/Windows/MainWindow.cs
+++ b/renderdocui/Windows/MainWindow.cs
@@ -1137,7 +1137,7 @@ namespace renderdocui.Windows
                 // allow live captures to this host to stay open, that way
                 // we can connect to a live capture, then switch into that
                 // context
-                if (live.Hostname == host.Hostname)
+                if (host != null && live.Hostname == host.Hostname)
                     continue;
 
                 if (live.CheckAllowClose() == false)