diff --git a/src/ui/editorwidgets/qgsrelationreferenceconfigdlgbase.ui b/src/ui/editorwidgets/qgsrelationreferenceconfigdlgbase.ui
index edfe03e421c..61adf6aee89 100644
--- a/src/ui/editorwidgets/qgsrelationreferenceconfigdlgbase.ui
+++ b/src/ui/editorwidgets/qgsrelationreferenceconfigdlgbase.ui
@@ -78,7 +78,7 @@
      <property name="text">
       <string>Display expression Ⓘ</string>
      </property>
-     <property name="tooltip">
+     <property name="toolTip">
       <string>This setting is not saved in the style. It is changing the display name on the referenced layer.</string>
      </property>
     </widget>