diff --git a/bulk_network.php b/bulk_network.php
index b6aa9f1b3..939b88341 100644
--- a/bulk_network.php
+++ b/bulk_network.php
@@ -155,8 +155,12 @@
 
       // Load up the $row[] array with the values according to the mapping supplied by the user
       foreach( $fields as $fname ) {
-        $addr = chr( 64 + $_REQUEST[$fname]);
-        $row[$fname] = sanitize($sheet->getCell( $addr . $n )->getValue());
+        if ( $_REQUEST[$fname] == 0 ) {
+          $row[$fname] = "";
+        } else {
+          $addr = chr( 64 + $_REQUEST[$fname]);
+          $row[$fname] = sanitize($sheet->getCell( $addr . $n )->getValue());
+        }
       }
 
       switch( $_REQUEST["KeyField"] ) {