diff --git a/lib/Versions/VersionsBackend.php b/lib/Versions/VersionsBackend.php
index d598095dc..20e6d3d22 100644
--- a/lib/Versions/VersionsBackend.php
+++ b/lib/Versions/VersionsBackend.php
@@ -421,4 +421,8 @@ public function clearVersionsForFile(IUser $user, Node $source, Node $target): v
 		$folderId = $this->getFolderIdForFile($source);
 		$this->deleteAllVersionsForFile($folderId, $target->getId());
 	}
+
+	public function getRevision(\OC\Files\Node\Node $node): int {
+		return $node->getMTime();
+	}
 }