diff --git a/include/msgpack/v1/adaptor/map.hpp b/include/msgpack/v1/adaptor/map.hpp
index 0840c15a..9ab962ca 100644
--- a/include/msgpack/v1/adaptor/map.hpp
+++ b/include/msgpack/v1/adaptor/map.hpp
@@ -194,14 +194,22 @@ struct object_with_zone<std::map<K, V, Compare, Alloc> > {
         }
         else {
             uint32_t size = checked_get_container_size(v.size());
+
             msgpack::object_kv* p = static_cast<msgpack::object_kv*>(o.zone.allocate_align(sizeof(msgpack::object_kv)*size));
             msgpack::object_kv* const pend = p + size;
             o.via.map.ptr  = p;
             o.via.map.size = size;
             typename std::map<K, V, Compare, Alloc>::const_iterator it(v.begin());
             do {
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif // (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && !defined(__clang__)
                 p->key = msgpack::object(it->first, o.zone);
                 p->val = msgpack::object(it->second, o.zone);
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif // (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && !defined(__clang__)
                 ++p;
                 ++it;
             } while(p < pend);