diff --git a/Userland/Services/WindowServer/WindowFrame.cpp b/Userland/Services/WindowServer/WindowFrame.cpp
index 0756e54c31..f39a6fc461 100644
--- a/Userland/Services/WindowServer/WindowFrame.cpp
+++ b/Userland/Services/WindowServer/WindowFrame.cpp
@@ -242,6 +242,7 @@ bool WindowFrame::has_shadow() const
 void WindowFrame::did_set_maximized(Badge<Window>, bool maximized)
 {
     VERIFY(m_maximize_button);
+    set_dirty();
     m_maximize_button->set_icon(maximized ? s_restore_icon : s_maximize_icon);
 }