diff --git a/sql/data.go b/sql/data.go
index 852412e7..6de2dfb3 100644
--- a/sql/data.go
+++ b/sql/data.go
@@ -50,7 +50,7 @@ func (p *parser) parseData() (exp Expr, err error) {
 
 func (p *parser) parseSet() (mul Expr, err error) {
 
-	out := DataExpression{}
+	out := &DataExpression{}
 
 	for {