diff --git a/download-yt-feeds b/download-yt-feeds
index a7d1824..06f777e 100755
--- a/download-yt-feeds
+++ b/download-yt-feeds
@@ -71,7 +71,8 @@ function main()
     done
     files_after="$(find "${download_dir}" -type f)"
     while read file; do
-        if [[ ! "${files_before}" =~ "${file}" ]]; then
+        # https://stackoverflow.com/a/8811800/5965450
+        if [[ "${files_before#*${file}}" == "${files_before}" ]]; then
             echo "${file/${download_dir}\//}" \
                  >> "${download_dir}/New_$(date +'%F_%R').m3u"
         fi