diff --git a/lib/ImportSource.php b/lib/ImportSource.php
index 9ad3bac4..8537a1c4 100644
--- a/lib/ImportSource.php
+++ b/lib/ImportSource.php
@@ -61,6 +61,13 @@ public function getFileAsStream(string $path) {
 		return $this->archive->getStream($path, 'r');
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getFolderListing(string $path): array {
+		return $this->archive->getFolder($path);
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */