diff --git a/v4/ast.go b/v4/ast.go
index fb2072e..c40e4e9 100644
--- a/v4/ast.go
+++ b/v4/ast.go
@@ -2200,7 +2200,7 @@ type ExpressionList struct {
 	typer
 	valuer
 	AssignmentExpression ExpressionNode
-	ExpressionList       ExpressionNode
+	ExpressionList       *ExpressionList
 	Token                Token
 }
 
@@ -2236,8 +2236,10 @@ func (n *ExpressionStatement) Position() (r token.Position) {
 		return r
 	}
 
-	if p := n.ExpressionList.Position(); p.IsValid() {
-		return p
+	if n.ExpressionList != nil {
+		if p := n.ExpressionList.Position(); p.IsValid() {
+			return p
+		}
 	}
 
 	return n.Token.Position()