diff --git a/lib/Account.php b/lib/Account.php
index 4abac984ec..c58fe43709 100644
--- a/lib/Account.php
+++ b/lib/Account.php
@@ -240,7 +240,7 @@ public function calculateAndSetQuotaPercentage(Service\Quota $quota): void {
 		$this->account->setQuotaPercentage($percentage);
 	}
 
-	public function getQuotaPercentage(): int {
+	public function getQuotaPercentage(): ?int {
 		return $this->account->getQuotaPercentage();
 	}
 }