diff --git a/wireless-regdb/gen-pubcert.sh b/wireless-regdb/gen-pubcert.sh

index 1a4d579..69c6a0f 100755

--- a/wireless-regdb/gen-pubcert.sh

+++ b/wireless-regdb/gen-pubcert.sh

@@ -5,14 +5,15 @@ if [[ $# -ne 2 ]]; then

 	exit 1

 fi

+cat << EOF > pubcert.conf

+[ req ]

+distinguished_name = req_distinguished_name

+string_mask = utf8only

+prompt = no

+[ req_distinguished_name ]

+commonName = $3

+EOF

+

 openssl req -new -key "$1" -days 36500 -utf8 -nodes -batch \

 	-x509 -outform PEM -out "$2" \

-	-config <(cat <<-EOF

-		[ req ]

-		distinguished_name = req_distinguished_name

-		string_mask = utf8only

-		prompt = no

-		[ req_distinguished_name ]

-		commonName = $3

-		EOF

-	)

+	-config pubcert.conf