diff --git a/code/SQLite3Database.php b/code/SQLite3Database.php
index 7ba7815..f6a335e 100644
--- a/code/SQLite3Database.php
+++ b/code/SQLite3Database.php
@@ -361,8 +361,12 @@ class SQLite3Database extends SS_Database {
 			$this->alterationMessage("Checking database integrity","repaired");
 			if($msgs = $this->query('PRAGMA integrity_check')) foreach($msgs as $msg) if($msg['integrity_check'] != 'ok') { Debug::show($msg['integrity_check']); $ok = false; }
 			if(self::$vacuum) {
-				$this->query('VACUUM');
-				$this->alterationMessage("VACUUMing","repaired");
+				$this->query('VACUUM', E_USER_NOTICE);
+				if(preg_match('/authoriz/', $msg = $this->dbConn->lastErrorMsg())) {
+					$this->alterationMessage('VACUUM | ' . $msg, "error");
+				} else {
+					$this->alterationMessage("VACUUMing", "repaired");
+				}
 			}
 			self::$checked_and_repaired = true;
 		}