diff --git a/includes/functions/functions_strings.php b/includes/functions/functions_strings.php
index 0e298b8371..1c77f75dc3 100644
--- a/includes/functions/functions_strings.php
+++ b/includes/functions/functions_strings.php
@@ -332,7 +332,7 @@ function zen_clean_html($clean_it, $extraTags = '')
     if (!is_array($extraTags)) $extraTags = [$extraTags];
 
     // remove any embedded javascript
-    $clean_it = preg_replace('#<script(.*?)>(.*?)</script>#is', '', $clean_it);
+    $clean_it = preg_replace('#<script(.*?)>(.*?)</script>#is', '', $clean_it ?? '');
 
     $clean_it = preg_replace('/\r/', ' ', $clean_it);
     $clean_it = preg_replace('/\t/', ' ', $clean_it);
diff --git a/includes/modules/pages/product_info/main_template_vars.php b/includes/modules/pages/product_info/main_template_vars.php
index 1275fbb3bc..45d58016ee 100644
--- a/includes/modules/pages/product_info/main_template_vars.php
+++ b/includes/modules/pages/product_info/main_template_vars.php
@@ -66,7 +66,8 @@
         $products_name = $product_info->fields['lang'][$_SESSION['languages_code']]['products_name'];
         $products_model = $product_info->fields['products_model'];
         // if no common markup tags in description, add line breaks for readability:
-        $products_description = (!preg_match('/(<br|<p|<div|<dd|<li|<span)/i', $product_info->fields['lang'][$_SESSION['languages_code']]['products_description']) ? nl2br($product_info->fields['lang'][$_SESSION['languages_code']]['products_description']) : $product_info->fields['lang'][$_SESSION['languages_code']]['products_description']);
+        $products_description = $product_info->fields['lang'][$_SESSION['languages_code']]['products_description'] ?? '';
+        $products_description = (!preg_match('/(<br|<p|<div|<dd|<li|<span)/i', $products_description) ? nl2br($products_description) : $products_description);
 
         $products_image = (($product_not_found || $product_info->fields['products_image'] == '') && PRODUCTS_IMAGE_NO_IMAGE_STATUS == '1') ? PRODUCTS_IMAGE_NO_IMAGE : '';
         if ($product_info->fields['products_image'] != '' || PRODUCTS_IMAGE_NO_IMAGE_STATUS != '1') {
diff --git a/includes/modules/product_listing.php b/includes/modules/product_listing.php
index b2d9b650b6..53d7d6553b 100644
--- a/includes/modules/product_listing.php
+++ b/includes/modules/product_listing.php
@@ -218,7 +218,7 @@
             $listing_product_name = zen_get_products_name((int)$record['products_id']);
             $listing_description = '';
             if ((int)PRODUCT_LIST_DESCRIPTION > 0) {
-                $listing_description = zen_trunc_string(zen_clean_html(stripslashes($record['products_description'])), PRODUCT_LIST_DESCRIPTION);
+                $listing_description = zen_trunc_string(zen_clean_html(stripslashes($record['products_description'] ?? '')), PRODUCT_LIST_DESCRIPTION);
             }
             $listing_model = $record['products_model'] ?? '';
             $listing_mfg_name = $record['manufacturers_name'] ?? '';
diff --git a/includes/modules/responsive_classic/product_listing.php b/includes/modules/responsive_classic/product_listing.php
index aa93f91134..3337070f6f 100644
--- a/includes/modules/responsive_classic/product_listing.php
+++ b/includes/modules/responsive_classic/product_listing.php
@@ -214,7 +214,7 @@
             $listing_product_name = $record['products_name'] ?? '';
             $listing_description = '';
             if ((int)PRODUCT_LIST_DESCRIPTION > 0) {
-                $listing_description = zen_trunc_string(zen_clean_html(stripslashes($record['products_description'])), PRODUCT_LIST_DESCRIPTION);
+                $listing_description = zen_trunc_string(zen_clean_html(stripslashes($record['products_description'] ?? '')), PRODUCT_LIST_DESCRIPTION);
                 $lc_text .= '<div class="listingDescription">' . $listing_description . '</div>';
             }
             $listing_model = $record['products_model'] ?? '';