diff --git a/Upsilon/Parser/StatementSyntax/AssignmentExpressionSyntax.cs b/Upsilon/Parser/StatementSyntax/AssignmentExpressionSyntax.cs
index 9eed395..ca731b8 100644
--- a/Upsilon/Parser/StatementSyntax/AssignmentExpressionSyntax.cs
+++ b/Upsilon/Parser/StatementSyntax/AssignmentExpressionSyntax.cs
@@ -1,8 +1,9 @@
 using System.Collections.Generic;
+using Upsilon.Text;
 
 namespace Upsilon.Parser
 {
-    public class AssignmentExpressionSyntax : StatementSyntax
+    public sealed class AssignmentExpressionSyntax : StatementSyntax
     {
         public AssignmentExpressionSyntax(SyntaxToken localToken, IdentifierToken identifier, SyntaxToken equalsToken,
             ExpressionSyntax expression)
@@ -11,6 +12,8 @@ namespace Upsilon.Parser
             Identifier  = identifier;
             EqualsToken = equalsToken;
             Expression  = expression;
+            var start = LocalToken?.Span.Start ?? Identifier.Span.Start;
+            Span = new TextSpan(start, Expression.Span.End);
         }
 
         public override SyntaxKind Kind => SyntaxKind.AssignmentStatement;