diff --git a/mod/data/field/number/field.class.php b/mod/data/field/number/field.class.php
index e3053c8ba5b..a041fc0a1e9 100644
--- a/mod/data/field/number/field.class.php
+++ b/mod/data/field/number/field.class.php
@@ -64,7 +64,7 @@ class data_field_number extends data_field_base {
 
     function display_browse_field($recordid, $template) {
         $content = $this->get_data_content($recordid);
-        if (!$content || empty($content->content)) {
+        if (!$content || $content->content === '') {
             return '';
         }
         $number = $content->content;