diff --git a/client/CXWindowsSecondaryScreen.cpp b/client/CXWindowsSecondaryScreen.cpp
index 79ff7efd..84995990 100644
--- a/client/CXWindowsSecondaryScreen.cpp
+++ b/client/CXWindowsSecondaryScreen.cpp
@@ -319,7 +319,7 @@ void					CXWindowsSecondaryScreen::onOpenDisplay()
 	// as the cursor enters the screen or the display's real cursor is
 	// moved.
 	XSetWindowAttributes attr;
-	attr.event_mask            = LeaveWindowMask;
+	attr.event_mask            = LeaveWindowMask | PropertyChangeMask;
 	attr.do_not_propagate_mask = 0;
 	attr.override_redirect     = True;
 	attr.cursor                = createBlankCursor();