diff --git a/app/Models/Product/Type.php b/app/Models/Product/Type.php
index 06fcdee..9cb7512 100644
--- a/app/Models/Product/Type.php
+++ b/app/Models/Product/Type.php
@@ -56,11 +56,11 @@ abstract class Type extends Model implements ProductItem
 	 * The product contract term is the highest of our defined contract_term (in Products/*) vs the suppliers
 	 * contract term (defined in Supplier/*).
 	 *
-	 * @param int $val
+	 * @param int|null $val
 	 * @return int
 	 */
-	public function getContractTermAttribute(int $val): int
+	public function getContractTermAttribute(?int $val): int
 	{
-		return max($val,$this->supplied->contract_term);
+		return max($val ?: 0,$this->supplied->contract_term);
 	}
 }
\ No newline at end of file