diff --git a/plasma-integration.spec b/plasma-integration.spec
index 6905c6f..2b639c5 100644
--- a/plasma-integration.spec
+++ b/plasma-integration.spec
@@ -32,6 +32,7 @@ BuildRequires:  cmake(KF5IconThemes)
 BuildRequires:  cmake(KF5KIO)
 BuildRequires:  cmake(KF5Notifications)
 BuildRequires:  cmake(KF5WidgetsAddons)
+BuildRequires:  cmake(KF5WindowSystem)
 BuildRequires:  cmake(KF5Wayland)
 
 ## TODO: verify this is needed, not 100% sure -- rex