diff --git a/lib/Db/ConfigMapper.php b/lib/Db/ConfigMapper.php
index 62671745567de7aa2b9426e37f47cca1e204ec7d..1820cd2ac776e4cb9506447438aa42e67b4c44b2 100644
--- a/lib/Db/ConfigMapper.php
+++ b/lib/Db/ConfigMapper.php
@@ -16,9 +16,10 @@ class ConfigMapper {
 
 
 	public function getUsersByRecoveryEmail(string $pattern) : array {
+		$pattern = strtolower($pattern);
 		$qb = $this->connection->getQueryBuilder();
 		$qb->select('userid')
-			->from("preferences")->where('`configvalue` like :pattern AND (`configkey` = "unverified-recovery-email" OR `configkey` = "recovery-email") AND `appid` = :appname ')
+			->from("preferences")->where('LOWER(`configvalue`) like :pattern AND (`configkey` = "unverified-recovery-email" OR `configkey` = "recovery-email") AND `appid` = :appname ')
 			->setParameter('pattern', $pattern)
 			->setParameter('appname', $this->appName);
 		$result = $qb->execute();