diff --git a/utils.sh b/utils.sh
index 84b5a41..13cd9af 100644
--- a/utils.sh
+++ b/utils.sh
@@ -159,7 +159,7 @@
 
 fetch_and_archive() {
 	url=${url:?}
-	filename=${filename:-basename $url}
+	filename=${filename:-$(basename $url)}
 
 	url="$url" saveas="$filename" fetch_file
 	archive_file "$filename"