diff --git a/src/librekey/key_store_g10.cpp b/src/librekey/key_store_g10.cpp
index e646f02fb..fd9047924 100644
--- a/src/librekey/key_store_g10.cpp
+++ b/src/librekey/key_store_g10.cpp
@@ -338,7 +338,7 @@ gnupg_sexp_t::add_mpi(const std::string &name, const pgp_mpi_t &mpi)
     if (idx < len) {
         if (mpi.mpi[idx] & 0x80) {
             data.append(0);
-            data.std::basic_string<uint8_t>::append(mpi.mpi + idx, len - idx);
+            data.append(mpi.mpi + idx, len - idx);
         } else {
             data.assign(mpi.mpi + idx, mpi.mpi + len);
         }
@@ -805,7 +805,7 @@ g23_parse_seckey(pgp_key_pkt_t &seckey,
         return false;
     }
 
-    auto &           alg_bt = alg_s_exp->sexp_string_at(0)->get_string();
+    auto &           alg_bt = alg_s_exp->sexp_string_at(0)->get_string().as_string();
     pgp_pubkey_alg_t alg = static_cast<pgp_pubkey_alg_t>(
       id_str_pair::lookup(g10_alg_aliases, alg_bt.c_str(), PGP_PKA_NOTHING));
     if (alg == PGP_PKA_NOTHING) {