diff --git a/Console/TeslaConsole/SitePanel.cs b/Console/TeslaConsole/SitePanel.cs
index c2b33e0..a19bdab 100644
--- a/Console/TeslaConsole/SitePanel.cs
+++ b/Console/TeslaConsole/SitePanel.cs
@@ -1516,7 +1516,11 @@ internal class SitePanel : DockContent
 		for (int i = 0; i < rVolumeItems.Length; i++)
 		{
 			mnuVolume.DropDownItems.Add(rVolumeItems[i]);
-			((ToolStripMenuItem)mnuVolume.DropDownItems[i]).Checked = i + 1 == num / 10;
+			// Item i displays i*10 ("mute" at 0), so the reported level maps to
+			// index num/10 directly. The original console checked i+1 here — the
+			// mark sat one step below the actual volume, and mute (0) never got
+			// a mark at all. Original bug (4.11.3), fixed 2026-07-11.
+			((ToolStripMenuItem)mnuVolume.DropDownItems[i]).Checked = i == num / 10;
 		}
 	}