diff --git a/func/deb_sys.sh b/func/deb_sys.sh
index 728ba91..f678e6f 100644
--- a/func/deb_sys.sh
+++ b/func/deb_sys.sh
@@ -790,6 +790,7 @@ do_deb_sys_cert_install(){
   -out \"$cert_pfx\" \
   -inkey \"$cert_key\" \
   -in \"$pfx_input\" \
+  -certfile \"$pfx_input\" \
   -passout pass: \
   -legacy \
   && chown root:\"$current_group\" \"$cert_pfx\" \