diff --git a/src/libraries/System.Linq.Expressions/ref/System.Linq.Expressions.cs b/src/libraries/System.Linq.Expressions/ref/System.Linq.Expressions.cs
index 09923d433d67e..bf467f927d4fa 100644
--- a/src/libraries/System.Linq.Expressions/ref/System.Linq.Expressions.cs
+++ b/src/libraries/System.Linq.Expressions/ref/System.Linq.Expressions.cs
@@ -834,7 +834,7 @@ internal Expression() { }
         public new TDelegate Compile() { throw null; }
         public new TDelegate Compile(bool preferInterpretation) { throw null; }
         public new TDelegate Compile(System.Runtime.CompilerServices.DebugInfoGenerator debugInfoGenerator) { throw null; }
-        public System.Linq.Expressions.Expression<TDelegate>? Update(System.Linq.Expressions.Expression body, System.Collections.Generic.IEnumerable<System.Linq.Expressions.ParameterExpression>? parameters) { throw null; }
+        public System.Linq.Expressions.Expression<TDelegate> Update(System.Linq.Expressions.Expression body, System.Collections.Generic.IEnumerable<System.Linq.Expressions.ParameterExpression>? parameters) { throw null; }
     }
     public sealed partial class GotoExpression : System.Linq.Expressions.Expression
     {
@@ -1008,7 +1008,7 @@ internal MethodCallExpression() { }
         public sealed override System.Type Type { get { throw null; } }
         protected internal override System.Linq.Expressions.Expression Accept(System.Linq.Expressions.ExpressionVisitor visitor) { throw null; }
         System.Linq.Expressions.Expression System.Linq.Expressions.IArgumentProvider.GetArgument(int index) { throw null; }
-        public System.Linq.Expressions.MethodCallExpression Update(System.Linq.Expressions.Expression @object, System.Collections.Generic.IEnumerable<System.Linq.Expressions.Expression>? arguments) { throw null; }
+        public System.Linq.Expressions.MethodCallExpression Update(System.Linq.Expressions.Expression? @object, System.Collections.Generic.IEnumerable<System.Linq.Expressions.Expression>? arguments) { throw null; }
     }
     public partial class NewArrayExpression : System.Linq.Expressions.Expression
     {
diff --git a/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs b/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs
index 30ccac84af718..8f50c40fd7d3a 100644
--- a/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs
+++ b/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs
@@ -219,7 +219,7 @@ internal Expression(Expression body)
         /// <param name="body">The <see cref="LambdaExpression.Body" /> property of the result.</param>
         /// <param name="parameters">The <see cref="LambdaExpression.Parameters" /> property of the result.</param>
         /// <returns>This expression if no children changed, or an expression with the updated children.</returns>
-        public Expression<TDelegate>? Update(Expression body, IEnumerable<ParameterExpression>? parameters)
+        public Expression<TDelegate> Update(Expression body, IEnumerable<ParameterExpression>? parameters)
         {
             if (body == Body)
             {
diff --git a/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/MethodCallExpression.cs b/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/MethodCallExpression.cs
index 9217c5efbf98c..05155a1646c8a 100644
--- a/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/MethodCallExpression.cs
+++ b/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/MethodCallExpression.cs
@@ -59,7 +59,7 @@ internal MethodCallExpression(MethodInfo method)
         /// <param name="object">The <see cref="Object"/> property of the result.</param>
         /// <param name="arguments">The <see cref="Arguments"/> property of the result.</param>
         /// <returns>This expression if no children changed, or an expression with the updated children.</returns>
-        public MethodCallExpression Update(Expression @object, IEnumerable<Expression>? arguments)
+        public MethodCallExpression Update(Expression? @object, IEnumerable<Expression>? arguments)
         {
             if (@object == Object)
             {