diff --git a/src/bin/screen_blanker/ScreenSaverWindow.cpp b/src/bin/screen_blanker/ScreenSaverWindow.cpp
index 0a0e962a2b..3c6a5b6839 100644
--- a/src/bin/screen_blanker/ScreenSaverWindow.cpp
+++ b/src/bin/screen_blanker/ScreenSaverWindow.cpp
@@ -79,7 +79,8 @@ ScreenSaverFilter::SetEnabled(bool enabled)
 ScreenSaverWindow::ScreenSaverWindow(BRect frame)
 	: BDirectWindow(frame, "ScreenSaver Window",
 		B_NO_BORDER_WINDOW_LOOK, kWindowScreenFeel,
-		B_NOT_RESIZABLE | B_NOT_MOVABLE | B_NOT_ZOOMABLE, B_ALL_WORKSPACES),
+		B_NOT_RESIZABLE | B_NOT_MOVABLE | B_NOT_MINIMIZABLE
+		| B_NOT_ZOOMABLE | B_NOT_CLOSABLE, B_ALL_WORKSPACES),
 	fSaver(NULL)
 {
 	frame.OffsetTo(0, 0);