diff --git a/download-yt-feeds b/download-yt-feeds
index 227f0c6..56a5afc 100755
--- a/download-yt-feeds
+++ b/download-yt-feeds
@@ -56,7 +56,7 @@ function main()
     [[ -z "${max_videos}" ]] && local max_videos="last"
 
     mkdir -p "${download_dir}"
-    files_before="$(find "${download_dir}" -type f)"
+    local files_before="$(find "${download_dir}" -type f)"
     local -a feedlist=("${(@Q)${(z)$(read_feedlist)}}")
     for feed in ${feedlist}; do
         youtube-dl \
@@ -69,7 +69,7 @@ function main()
             "${feed}"
         # [[ ${?} -eq 0 ]] || die 3 "youtube-dl returned an error."
     done
-    files_after="$(find "${download_dir}" -type f)"
+    local files_after="$(find "${download_dir}" -type f)"
     while read file; do
         # https://stackoverflow.com/a/8811800/5965450
         if [[ "${files_before#*${file}}" == "${files_before}" ]]; then