diff --git a/clients/oxygen/config/ui/oxygenshadowconfigurationui.ui b/clients/oxygen/config/ui/oxygenshadowconfigurationui.ui
index 53763d1fa3..630b6f85b7 100644
--- a/clients/oxygen/config/ui/oxygenshadowconfigurationui.ui
+++ b/clients/oxygen/config/ui/oxygenshadowconfigurationui.ui
@@ -90,10 +90,18 @@
     </widget>
    </item>
    <item row="0" column="1">
-    <widget class="KIntSpinBox" name="shadowSize"/>
+    <widget class="KIntSpinBox" name="shadowSize">
+     <property name="suffix">
+      <string>px</string>
+     </property>
+    </widget>
    </item>
    <item row="1" column="1">
-    <widget class="KIntSpinBox" name="verticalOffset"/>
+    <widget class="KIntSpinBox" name="verticalOffset">
+     <property name="suffix">
+      <string>px</string>
+     </property>
+    </widget>
    </item>
   </layout>
  </widget>