diff --git a/lib/private/Files/ObjectStore/S3ObjectTrait.php b/lib/private/Files/ObjectStore/S3ObjectTrait.php
index 0b2fd95c652ba..9d692e01a23f1 100644
--- a/lib/private/Files/ObjectStore/S3ObjectTrait.php
+++ b/lib/private/Files/ObjectStore/S3ObjectTrait.php
@@ -69,11 +69,14 @@ public function readObject($urn) {
 				'http' => [
 					'protocol_version' => $request->getProtocolVersion(),
 					'header' => $headers,
-				],
-				'ssl' => [
-					'cafile' => $this->getCertificateBundlePath()
 				]
 			];
+			$bundle = $this->getCertificateBundlePath();
+			if ($bundle) {
+				$opts['ssl'] = [
+					'cafile' => $bundle
+				];
+			}
 
 			if ($this->getProxy()) {
 				$opts['http']['proxy'] = $this->getProxy();