diff --git a/acme.sh b/acme.sh
index ecc6cb24..724f0e97 100755
--- a/acme.sh
+++ b/acme.sh
@@ -5277,6 +5277,7 @@ _process() {
       --openssl-bin)
         _openssl_bin="$2"
         ACME_OPENSSL_BIN="$_openssl_bin"
+        shift
         ;;
       *)
         _err "Unknown parameter : $1"