diff --git a/Framework.Core/System/Linq/Expressions/ExpressionVisitor.cs b/Framework.Core/System/Linq/Expressions/ExpressionVisitor.cs
index 901ca3c6f..610c80220 100644
--- a/Framework.Core/System/Linq/Expressions/ExpressionVisitor.cs
+++ b/Framework.Core/System/Linq/Expressions/ExpressionVisitor.cs
@@ -721,6 +721,7 @@ protected virtual ElementInit VisitElementInit(ElementInit node)
         ///     The modified expression, if it or any subexpression was modified;
         ///     otherwise, returns the original expression.
         /// </returns>
+        [return: NotNullIfNotNull("node")]
         protected virtual LabelTarget? VisitLabelTarget(LabelTarget? node)
         {
             return node;