diff --git a/src/shrpx_config.cc b/src/shrpx_config.cc
index 5f2e51cb..1046fdf0 100644
--- a/src/shrpx_config.cc
+++ b/src/shrpx_config.cc
@@ -2603,6 +2603,9 @@ StringRef strproto(shrpx_proto proto) {
   case PROTO_MEMCACHED:
     return StringRef::from_lit("memcached");
   }
+
+  // gcc needs this.
+  assert(0);
 }
 
 } // namespace shrpx
diff --git a/src/shrpx_ssl.cc b/src/shrpx_ssl.cc
index 208a7342..a36b20be 100644
--- a/src/shrpx_ssl.cc
+++ b/src/shrpx_ssl.cc
@@ -1325,17 +1325,17 @@ SSL_CTX *setup_downstream_client_ssl_context(
 }
 
 void setup_downstream_http2_alpn(SSL *ssl) {
-  auto alpn = util::get_default_alpn();
 #if OPENSSL_VERSION_NUMBER >= 0x10002000L
   // ALPN advertisement
+  auto alpn = util::get_default_alpn();
   SSL_set_alpn_protos(ssl, alpn.data(), alpn.size());
 #endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
 }
 
 void setup_downstream_http1_alpn(SSL *ssl) {
-  auto alpn = StringRef::from_lit(NGHTTP2_H1_1_ALPN);
 #if OPENSSL_VERSION_NUMBER >= 0x10002000L
   // ALPN advertisement
+  auto alpn = StringRef::from_lit(NGHTTP2_H1_1_ALPN);
   SSL_set_alpn_protos(ssl, alpn.byte(), alpn.size());
 #endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
 }