diff --git a/uptimeatomic b/uptimeatomic
index 0210a1d..c4de84a 100755
--- a/uptimeatomic
+++ b/uptimeatomic
@@ -188,7 +188,7 @@ fi
 _TMP="$(mktemp -d)"
 mkdir -p "${_TMP}/ok" "${_TMP}/ko" "${_TMP}/maint" || exit 1
 _HTMLFILE="${_TMP}/${HTMLFILE}"
-_RSSFILE="${HTMLDIR}/${RSS_FILE}"
+[[ -n "${RSS_FILE}" ]] && _RSSFILE="${HTMLDIR}/${RSS_FILE}"
 
 parse_file "${CHECKFILE}"