diff --git a/letsencrypt/lib/common b/letsencrypt/lib/common
index e841d62a..1ada8a80 100644
--- a/letsencrypt/lib/common
+++ b/letsencrypt/lib/common
@@ -78,6 +78,7 @@ letsencrypt_get_challenge_type() {
 
 letsencrypt_set_renew_before_expiry() {
     local domain="$1" days="$2" renewal_file
+    domain="${domain#\*.}"  ## remove '*.' from wildcard domain
     renewal_file="$SERVICE_DATASTORE"/etc/letsencrypt/renewal/"$domain".conf
     [ -e "$renewal_file" ] || return 1
     sed -ri "s/^(#\s+)?(renew_before_expiry\s*=)\s*[0-9]+(\s+days)$/\2 $days\3/g" "$renewal_file"