diff --git a/src/anbox/android/ip_config_builder.h b/src/anbox/android/ip_config_builder.h
index 6ae0db0..812da7c 100644
--- a/src/anbox/android/ip_config_builder.h
+++ b/src/anbox/android/ip_config_builder.h
@@ -26,7 +26,8 @@
 
 namespace anbox {
 namespace android {
-struct IpConfigBuilder {
+class IpConfigBuilder {
+ public:
   enum class Version : std::uint32_t {
     Version1 = 1,
     Version2 = 2,
@@ -37,6 +38,8 @@ struct IpConfigBuilder {
     DHCP,
   };
 
+  IpConfigBuilder() = default;
+
   std::size_t write(common::BinaryWriter &writer);
 
   void set_version(const Version &version);