diff --git a/apps/dav/lib/Connector/Sabre/QuotaPlugin.php b/apps/dav/lib/Connector/Sabre/QuotaPlugin.php
index 687b05e86cb89..b37325430e745 100644
--- a/apps/dav/lib/Connector/Sabre/QuotaPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/QuotaPlugin.php
@@ -250,11 +250,13 @@ public function getLength() {
 		}
 
 		$ocLength = $req->getHeader('OC-Total-Length');
-		if (is_numeric($length) && is_numeric($ocLength)) {
-			return max($length, $ocLength);
+		if (!is_numeric($ocLength)) {
+			return $length;
 		}
-
-		return $length;
+		if (!is_numeric($length)) {
+			return $ocLength;
+		}
+		return max($length, $ocLength);
 	}
 
 	/**
diff --git a/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php b/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php
index 4a9ca159bbd8c..ff864256cb755 100644
--- a/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php
+++ b/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php
@@ -42,7 +42,6 @@
  * See the COPYING-README file.
  */
 class QuotaPluginTest extends TestCase {
-
 	/** @var \Sabre\DAV\Server | \PHPUnit\Framework\MockObject\MockObject */
 	private $server;
 
@@ -149,8 +148,8 @@ public function lengthProvider() {
 			[null, ['CONTENT-LENGTH' => 'A']],
 			[1024, ['OC-TOTAL-LENGTH' => 'A', 'CONTENT-LENGTH' => '1024']],
 			[1024, ['OC-TOTAL-LENGTH' => 'A', 'X-EXPECTED-ENTITY-LENGTH' => '1024']],
-			[null, ['OC-TOTAL-LENGTH' => '2048', 'X-EXPECTED-ENTITY-LENGTH' => 'A']],
-			[null, ['OC-TOTAL-LENGTH' => '2048', 'CONTENT-LENGTH' => 'A']],
+			[2048, ['OC-TOTAL-LENGTH' => '2048', 'X-EXPECTED-ENTITY-LENGTH' => 'A']],
+			[2048, ['OC-TOTAL-LENGTH' => '2048', 'CONTENT-LENGTH' => 'A']],
 		];
 	}