diff --git a/incl/api.inc.php b/incl/api.inc.php
index 45562ac..45b1c56 100755
--- a/incl/api.inc.php
+++ b/incl/api.inc.php
@@ -63,12 +63,16 @@ public static function parseProductInfoStock(array $infoArray): GrocyProduct {
         $result->name                  = sanitizeString($infoArray["product"]["name"]);
         $result->isTare                = ($infoArray["product"]["enable_tare_weight_handling"] == "1");
         $result->tareWeight            = sanitizeString($infoArray["product"]["tare_weight"]);
-        $result->quFactor              = sanitizeString($infoArray["product"]["qu_conversion_factor_purchase_to_stock"]);
         $result->defaultBestBeforeDays = $infoArray["product"]["default_best_before_days"];
         $result->creationDate          = $infoArray["product"]["row_created_timestamp"];
         $result->unit                  = sanitizeString($infoArray["quantity_unit_stock"]["name"]);
         $result->barcodes              = $infoArray["product_barcodes"];
 
+        if (isset($infoArray["product"]["qu_conversion_factor_purchase_to_stock"]))
+            $result->quFactor = sanitizeString($infoArray["product"]["qu_conversion_factor_purchase_to_stock"]);
+        else
+            $result->quFactor = 1;
+
         if (sanitizeString($infoArray["stock_amount"]) != null)
             $result->stockAmount = sanitizeString($infoArray["stock_amount"]);
         return $result;
@@ -336,7 +340,7 @@ public static function getGrocyVersion(): ?string {
      */
     public static function purchaseProduct(int $id, float $amount, string $bestbefore = null, string $price = null, LockGenerator &$fileLock = null, string $defaultBestBefore = null): bool {
         $data = array(
-            'amount' => $amount,
+            'amount'           => $amount,
             'transaction_type' => 'purchase'
         );
 
@@ -381,7 +385,7 @@ public static function purchaseProduct(int $id, float $amount, string $bestbefor
      */
     public static function removeFromShoppinglist(int $productid, float $amount): void {
         $data = json_encode(array(
-            'product_id' => $productid,
+            'product_id'     => $productid,
             'product_amount' => $amount
         ));
         $url  = API_SHOPPINGLIST . "remove-product";
@@ -405,7 +409,7 @@ public static function removeFromShoppinglist(int $productid, float $amount): vo
      */
     public static function addToShoppinglist(int $productid, float $amount): void {
         $data = json_encode(array(
-            'product_id' => $productid,
+            'product_id'     => $productid,
             'product_amount' => $amount
         ));
         $url  = API_SHOPPINGLIST . "add-product";
@@ -433,9 +437,9 @@ public static function consumeProduct(int $id, float $amount, bool $spoiled = fa
             return;
 
         $data = json_encode(array(
-            'amount' => $amount,
+            'amount'           => $amount,
             'transaction_type' => 'consume',
-            'spoiled' => $spoiled
+            'spoiled'          => $spoiled
         ));
 
         $url = API_STOCK . "/" . $id . "/consume";
@@ -465,8 +469,8 @@ public static function addBarcode(int $id, string $barcode, ?string $note): void
 
         $data = json_encode(array(
             "product_id" => $id,
-            "barcode" => $barcode,
-            "note" => $note
+            "barcode"    => $barcode,
+            "note"       => $note
         ));
 
         $curl = new CurlGenerator(API_O_BARCODES, METHOD_POST, $data);
@@ -713,7 +717,7 @@ public static function executeChore(int $choreId): void {
         $url  = API_CHORE_EXECUTE . $choreId . "/execute";
         $data = json_encode(array(
             'tracked_time' => "",
-            'done_by' => ""
+            'done_by'      => ""
         ));