diff --git a/app/code/Mage/ImportExport/Model/Import/Entity/Product.php b/app/code/Mage/ImportExport/Model/Import/Entity/Product.php
index 9cf9de8f593c9..b47afd0816306 100644
--- a/app/code/Mage/ImportExport/Model/Import/Entity/Product.php
+++ b/app/code/Mage/ImportExport/Model/Import/Entity/Product.php
@@ -1027,7 +1027,7 @@ protected function _saveProducts()
                 if(!is_null($productType)) {
                     $previousType = $productType;
                 }
-                if(!is_null($rowData[self::COL_ATTR_SET])) {
+                if(isset($rowData[self::COL_ATTR_SET]) && !is_null($rowData[self::COL_ATTR_SET])) {
                     $previousAttributeSet = $rowData[Mage_ImportExport_Model_Import_Entity_Product::COL_ATTR_SET];
                 }
                 if (self::SCOPE_NULL == $rowScope) {