diff --git a/src/configdlgbase.ui b/src/configdlgbase.ui
index 2d4dbd1..75d6ec2 100644
--- a/src/configdlgbase.ui
+++ b/src/configdlgbase.ui
@@ -41,4 +41,7 @@
 </widget>
 <layoutdefaults spacing="3" margin="6"/>
 <layoutfunctions spacing="KDialog::spacingHint" margin="KDialog::marginHint"/>
+<includes>
+    <include location="global" impldecl="in implementation">knuminput.h</include>
+</includes>
 </UI>