diff --git a/CRM/Upgrade/Incremental/php/FourSeven.php b/CRM/Upgrade/Incremental/php/FourSeven.php
index a549ee5acd0..1a7e9da7898 100644
--- a/CRM/Upgrade/Incremental/php/FourSeven.php
+++ b/CRM/Upgrade/Incremental/php/FourSeven.php
@@ -404,6 +404,26 @@ public function upgrade_4_7_23($rev) {
     $this->addTask(ts('Upgrade DB to %1: SQL', array(1 => $rev)), 'runSql', $rev);
   }
 
+  /**
+   * Upgrade function.
+   *
+   * @param string $rev
+   */
+  public function upgrade_4_7_24($rev) {
+    $this->addTask(ts('Upgrade DB to %1: SQL', array(1 => $rev)), 'runSql', $rev);
+
+    $this->addTask('CRM-20958 - Add created_date to civicrm_activity', 'addColumn',
+      'civicrm_activity', 'created_date', "timestamp NULL  DEFAULT NULL COMMENT 'When was the activity was created.'");
+    $this->addTask('CRM-20958 - Add modified_date to civicrm_activity', 'addColumn',
+      'civicrm_activity', 'modified_date', "timestamp NULL  DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT 'When was the activity (or closely related entity) was created or modified or deleted.'");
+    $this->addTask('CRM-20958 - Add created_date to civicrm_case', 'addColumn',
+      'civicrm_case', 'created_date', "timestamp NULL  DEFAULT NULL COMMENT 'When was the case was created.'");
+    $this->addTask('CRM-20958 - Add modified_date to civicrm_case', 'addColumn',
+      'civicrm_case', 'modified_date', "timestamp NULL  DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT 'When was the case (or closely related entity) was created or modified or deleted.'");
+
+    return TRUE;
+  }
+
   /*
    * Important! All upgrade functions MUST add a 'runSql' task.
    * Uncomment and use the following template for a new upgrade version