diff --git a/src/libstrongswan/plugins/pubkey/pubkey_cert.c b/src/libstrongswan/plugins/pubkey/pubkey_cert.c
index c50189a8b..aa4c69314 100644
--- a/src/libstrongswan/plugins/pubkey/pubkey_cert.c
+++ b/src/libstrongswan/plugins/pubkey/pubkey_cert.c
@@ -166,7 +166,7 @@ static bool get_validity(private_pubkey_cert_t *this, time_t *when,
 static bool get_encoding(private_pubkey_cert_t *this, cred_encoding_type_t type,
 						 chunk_t *encoding)
 {
-	return this->key->get_encoding(this->key, PUBKEY_ASN1_DER, encoding);
+	return this->key->get_encoding(this->key, type, encoding);
 }
 
 /**