diff --git a/src/cascadia/WindowsTerminal/IslandWindow.cpp b/src/cascadia/WindowsTerminal/IslandWindow.cpp
index bde1d614508..f7beb5cd584 100644
--- a/src/cascadia/WindowsTerminal/IslandWindow.cpp
+++ b/src/cascadia/WindowsTerminal/IslandWindow.cpp
@@ -362,6 +362,9 @@ void IslandWindow::OnSize(const UINT width, const UINT height)
             return 0;
         }
         CATCH_LOG();
+    case WM_THEMECHANGED:
+        UpdateWindowIconForActiveMetrics(_window.get());
+        return 0;
     }
 
     // TODO: handle messages here...