diff --git a/htdocs/admin/barcode.php b/htdocs/admin/barcode.php
index de05203f5f6..0c168ad27d2 100644
--- a/htdocs/admin/barcode.php
+++ b/htdocs/admin/barcode.php
@@ -373,7 +373,7 @@ if ($conf->product->enabled) {
 					print '</td>';
 					print '<td class="nowrap">'.$modBarCode->getExample($langs)."</td>\n";
 
-					if ($conf->global->BARCODE_PRODUCT_ADDON_NUM == "$file") {
+					if (!empty($conf->global->BARCODE_PRODUCT_ADDON_NUM) &&$conf->global->BARCODE_PRODUCT_ADDON_NUM == "$file") {
 						print '<td class="center"><a class="reposition" href="'.$_SERVER['PHP_SELF'].'?action=setbarcodeproductoff&token='.newToken().'&amp;value='.urlencode($file).'">';
 						print img_picto($langs->trans("Activated"), 'switch_on');
 						print '</a></td>';