diff --git a/app/Mage.php b/app/Mage.php
index 60b63294ec5..0c8564f9b7d 100644
--- a/app/Mage.php
+++ b/app/Mage.php
@@ -745,7 +745,7 @@ public static function run($code = '', $type = 'store', $options = [])
             if (isset($options['edition'])) {
                 self::$_currentEdition = $options['edition'];
             }
-            self::$_app    = new Mage_Core_Model_App();
+            self::$_app = new Mage_Core_Model_App();
             if (isset($options['request'])) {
                 self::$_app->setRequest($options['request']);
             }
@@ -769,6 +769,7 @@ public static function run($code = '', $type = 'store', $options = [])
             die();
         } catch (Exception $e) {
             if (self::isInstalled()) {
+                self::dispatchEvent('mage_run_installed_exception', ['exception' => $e]);
                 self::printException($e);
                 exit();
             }
diff --git a/docs/EVENTS.md b/docs/EVENTS.md
index 211975bbcad..63f7aa8a314 100644
--- a/docs/EVENTS.md
+++ b/docs/EVENTS.md
@@ -235,6 +235,7 @@
 | log_log_clean_after | 1.9.4.5 |
 | log_log_clean_before | 1.9.4.5 |
 | log_visitor_collection_load_before | 1.9.4.5 |
+| mage_run_installed_exception | 20.7.0 |
 | mage_run_exception | 1.9.4.5 |
 | model_config_data_save_before | 1.9.4.5 |
 | model_delete_after | 1.9.4.5 |