diff --git a/kf5-kdewebkit.spec b/kf5-kdewebkit.spec
index 40be8c2..5dcc3e6 100644
--- a/kf5-kdewebkit.spec
+++ b/kf5-kdewebkit.spec
@@ -30,6 +30,9 @@ BuildRequires:  kf5-rpm-macros >= %{majmin}
 BuildRequires:  qt5-qtbase-devel
 BuildRequires:  qt5-qtwebkit-devel
 
+# designer plugin
+BuildRequires:  cmake(Qt5UiPlugin)
+
 %description
 KDE Frameworks 5 Tier 3 integration module for the HTML rendering engine WebKit.