diff --git a/migrations/0209.sql b/migrations/0209.sql
index e437a3e2..dc0e3166 100644
--- a/migrations/0209.sql
+++ b/migrations/0209.sql
@@ -85,3 +85,19 @@ SELECT
 FROM stock s
 JOIN products_view p
 	ON s.product_id = p.id;
+
+CREATE TRIGGER default_qu_conversion AFTER INSERT ON products
+BEGIN
+	/*
+		Automatically create a default (product specific 1 to 1) QU conversion when a product
+		with qu_stock != qu_purchase was created and when no default QU conversion applies
+	*/
+
+	INSERT INTO quantity_unit_conversions
+		(from_qu_id, to_qu_id, factor, product_id)
+	SELECT p.qu_id_purchase, p.qu_id_stock, 1, p.id
+	FROM products p
+	WHERE p.id = NEW.id
+		AND p.qu_id_stock != qu_id_purchase
+		AND NOT EXISTS(SELECT 1 FROM quantity_unit_conversions_resolved WHERE product_id = p.id AND from_qu_id = p.qu_id_stock AND to_qu_id = p.qu_id_purchase);
+END;