diff --git a/chalk/ui/wdgautogradient.ui b/chalk/ui/wdgautogradient.ui
index 2db08d5bb..25615bef6 100644
--- a/chalk/ui/wdgautogradient.ui
+++ b/chalk/ui/wdgautogradient.ui
@@ -394,6 +394,7 @@
 </images>
 <layoutdefaults spacing="6" margin="11"/>
 <includes>
+    <include location="global" impldecl="in implementation">knuminput.h</include>
     <include location="global" impldecl="in implementation">kcolorbutton.h</include>
 </includes>
 </UI>