diff --git a/modules/mailalerts/mailalerts.php b/modules/mailalerts/mailalerts.php
index 82e9da99a..1516c0de5 100644
--- a/modules/mailalerts/mailalerts.php
+++ b/modules/mailalerts/mailalerts.php
@@ -540,8 +540,7 @@ class MailAlerts extends Module
 		$coverage = StockManagerFactory::getManager()->getProductCoverage($id_product, $id_product_attribute, $warning_coverage, $id_warehouse);
 
 		// if we need to send a notification
-		if ($product->active == 1 &&
-			($coverage < $warning_coverage) && !empty($this->_merchant_mails) &&
+		if ($product->active == 1 && $coverage !== -1 && ($coverage < $warning_coverage) && !empty($this->_merchant_mails) &&
 			Configuration::getGlobalValue('MA_MERCHANT_COVERAGE'))
 		{
 			$id_lang = (int)Context::getContext()->language->id;