diff --git a/acme.sh b/acme.sh
index a1ad4195..749400e2 100755
--- a/acme.sh
+++ b/acme.sh
@@ -4011,7 +4011,7 @@ _check_dns_entries() {
 #file
 _get_cert_issuers() {
   _cfile="$1"
-  if _contains "$(${ACME_OPENSSL_BIN:-openssl} help crl2pkcs7 2>&1)" "Usage: crl2pkcs7" || _contains "$(${ACME_OPENSSL_BIN:-openssl} crl2pkcs7 help 2>&1)" "unknown option help"; then
+  if _contains "$(${ACME_OPENSSL_BIN:-openssl} help crl2pkcs7 2>&1)" "Usage: crl2pkcs7" || _contains "$(${ACME_OPENSSL_BIN:-openssl} crl2pkcs7 -help 2>&1)" "Usage: crl2pkcs7" || _contains "$(${ACME_OPENSSL_BIN:-openssl} crl2pkcs7 help 2>&1)" "unknown option help"; then
     ${ACME_OPENSSL_BIN:-openssl} crl2pkcs7 -nocrl -certfile $_cfile | ${ACME_OPENSSL_BIN:-openssl} pkcs7 -print_certs -text -noout | grep 'Issuer:' | _egrep_o "CN *=[^,]*" | cut -d = -f 2
   else
     ${ACME_OPENSSL_BIN:-openssl} x509 -in $_cfile -text -noout | grep 'Issuer:' | _egrep_o "CN *=[^,]*" | cut -d = -f 2