diff --git a/plugins/tasklist/drivers/database/tasklist_database_driver.php b/plugins/tasklist/drivers/database/tasklist_database_driver.php
index d5d97041..9dac99eb 100644
--- a/plugins/tasklist/drivers/database/tasklist_database_driver.php
+++ b/plugins/tasklist/drivers/database/tasklist_database_driver.php
@@ -558,6 +558,9 @@ class tasklist_database_driver extends tasklist_driver
         if (is_array($prop['recurrence'])) {
             $prop['recurrence'] = $this->serialize_recurrence($prop['recurrence']);
         }
+        if (array_key_exists('complete', $prop)) {
+            $prop['complete'] = number_format($prop['complete'], 2, '.', '');
+        }
 
         foreach (array('parent_id', 'date', 'time', 'startdate', 'starttime', 'alarms', 'recurrence', 'status') as $col) {
             if (empty($prop[$col]))
@@ -611,6 +614,9 @@ class tasklist_database_driver extends tasklist_driver
         if (is_array($prop['recurrence'])) {
             $prop['recurrence'] = $this->serialize_recurrence($prop['recurrence']);
         }
+        if (array_key_exists('complete', $prop)) {
+            $prop['complete'] = number_format($prop['complete'], 2, '.', '');
+        }
 
         $sql_set = array();
         foreach (array('title', 'description', 'flagged', 'complete') as $col) {