diff --git a/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSV.php b/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSV.php
index a70d930af8..799d304416 100644
--- a/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSV.php
+++ b/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSV.php
@@ -349,7 +349,7 @@ public function lfInitParam(&$objFormParam, &$arrCSVFrame)
             $objFormParam->addParam(
                     $item['disp_name'],
                     $col,
-                    constant($item['size_const_type']),
+                    defined($item['size_const_type']) ? constant($item['size_const_type']) : $item['size_const_type'],
                     $item['mb_convert_kana_option'],
                     $arrErrorCheckTypes,
                     $item['default'],
diff --git a/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSVCategory.php b/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSVCategory.php
index 649d7d967f..af604b07d3 100644
--- a/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSVCategory.php
+++ b/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSVCategory.php
@@ -307,7 +307,7 @@ public function lfInitParam(SC_FormParam &$objFormParam, &$arrCSVFrame)
             $objFormParam->addParam(
                     $item['disp_name'],
                     $col,
-                    constant($item['size_const_type']),
+                    defined($item['size_const_type']) ? constant($item['size_const_type']) : $item['size_const_type'],
                     $item['mb_convert_kana_option'],
                     $arrErrorCheckTypes,
                     $item['default'],