diff --git a/plasma-drkonqi.spec b/plasma-drkonqi.spec
index 8165bd5..9b61c0b 100644
--- a/plasma-drkonqi.spec
+++ b/plasma-drkonqi.spec
@@ -34,6 +34,7 @@ BuildRequires:  cmake(KF5KIO)
 BuildRequires:  cmake(KF5Crash)
 BuildRequires:  cmake(KF5XmlRpcClient)
 BuildRequires:  cmake(KF5Wallet)
+BuildRequires:  cmake(KF5KWindowSystem)
 BuildRequires:  cmake(KF5IdleTime)
 BuildRequires:  cmake(Qt5X11Extras)