diff --git a/kf5-knewstuff.spec b/kf5-knewstuff.spec
index baa5307..bfe2ad6 100644
--- a/kf5-knewstuff.spec
+++ b/kf5-knewstuff.spec
@@ -35,6 +35,7 @@ BuildRequires:  kf5-kitemviews-devel >= %{majmin}
 BuildRequires:  kf5-kservice-devel >= %{majmin}
 BuildRequires:  kf5-ktextwidgets-devel >= %{majmin}
 BuildRequires:  kf5-kwidgetsaddons-devel >= %{majmin}
+BuildRequires:  kf5-kwindowsystem-devel >= %{majmin}
 BuildRequires:  kf5-kxmlgui-devel >= %{majmin}
 BuildRequires:  kf5-rpm-macros
 BuildRequires:  qt5-qtbase-devel