diff --git a/src/win/advanced-scene-switcher-win.cpp b/src/win/advanced-scene-switcher-win.cpp
index 720b4a3b..7cdfb8a1 100644
--- a/src/win/advanced-scene-switcher-win.cpp
+++ b/src/win/advanced-scene-switcher-win.cpp
@@ -47,6 +47,8 @@ static bool WindowValid(HWND window)
 
 void GetWindowList(vector<string>& windows)
 {
+	windows.resize(0);
+
 	HWND window = GetWindow(GetDesktopWindow(), GW_CHILD);
 
 	while (window)