diff --git a/storage/filesystem.go b/storage/filesystem.go
index 72b8188..bb5f2be 100644
--- a/storage/filesystem.go
+++ b/storage/filesystem.go
@@ -298,7 +298,7 @@ func (b *filesystemBackend) PutAddressObject(ctx context.Context, path string, c
 		return "", carddav.NewPreconditionError(carddav.PreconditionNoUIDConflict)
 	}
 
-	f, err := os.OpenFile(localPath, os.O_RDWR|os.O_CREATE, 0644)
+	f, err := os.Create(localPath)
 	if err != nil {
 		return "", err
 	}