diff --git a/demos/gtk-demo/scale.ui b/demos/gtk-demo/scale.ui
index a23d3b62bf..198fa09337 100644
--- a/demos/gtk-demo/scale.ui
+++ b/demos/gtk-demo/scale.ui
@@ -4,14 +4,20 @@
   <object class="GtkAdjustment" id="adjustment1">
     <property name="upper">4</property>
     <property name="value">2</property>
+    <property name="step-increment">0.1</property>
+    <property name="page-increment">1</property>
   </object>
   <object class="GtkAdjustment" id="adjustment2">
     <property name="upper">4</property>
     <property name="value">2</property>
+    <property name="step-increment">0.1</property>
+    <property name="page-increment">1</property>
   </object>
   <object class="GtkAdjustment" id="adjustment3">
     <property name="upper">4</property>
     <property name="value">2</property>
+    <property name="step-increment">0.1</property>
+    <property name="page-increment">1</property>
   </object>
   <object class="GtkWindow" id="window1">
     <property name="title" translatable="yes">Scales</property>