diff --git a/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php b/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php
index 198a09b4bc8..190e6584eb1 100644
--- a/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php
+++ b/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php
@@ -57,7 +57,7 @@ class AppleProvisioningNode implements INode, IProperties {
 
 		return [
 			'{DAV:}getcontentlength' => 42,
-			'{DAV:}getlastmodified' => $datetime->format(\DateTimeInterface::RFC2822),
+			'{DAV:}getlastmodified' => $datetime->format(\DateTimeInterface::RFC7231),
 		];
 	}
 
diff --git a/apps/dav/tests/unit/Provisioning/Apple/AppleProvisioningNodeTest.php b/apps/dav/tests/unit/Provisioning/Apple/AppleProvisioningNodeTest.php
index 53de908ca27..4f04aebb3e8 100644
--- a/apps/dav/tests/unit/Provisioning/Apple/AppleProvisioningNodeTest.php
+++ b/apps/dav/tests/unit/Provisioning/Apple/AppleProvisioningNodeTest.php
@@ -54,7 +54,7 @@ class AppleProvisioningNodeTest extends TestCase {
 
 		$this->assertEquals([
 			'{DAV:}getcontentlength' => 42,
-			'{DAV:}getlastmodified' => 'Sat, 01 Jan 2000 00:00:00 +0000',
+			'{DAV:}getlastmodified' => 'Sat, 01 Jan 2000 00:00:00 GMT',
 		], $this->node->getProperties([]));
 	}