diff --git a/MCT/Model/WindowInfo.swift b/MCT/Model/WindowInfo.swift
index 3221778..20c39c0 100644
--- a/MCT/Model/WindowInfo.swift
+++ b/MCT/Model/WindowInfo.swift
@@ -21,6 +21,6 @@ struct WindowInfo: Identifiable, Equatable {
     }
 
     static func == (lhs: WindowInfo, rhs: WindowInfo) -> Bool {
-        lhs.windowID == rhs.windowID
+        lhs.windowID == rhs.windowID && lhs.thumbnail === rhs.thumbnail
     }
 }