diff --git a/rmw_zenoh_cpp/src/rmw_init_options.cpp b/rmw_zenoh_cpp/src/rmw_init_options.cpp
index 61dbc1fa..2b79566a 100644
--- a/rmw_zenoh_cpp/src/rmw_init_options.cpp
+++ b/rmw_zenoh_cpp/src/rmw_init_options.cpp
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include <zenoh.h>
+#include <string.h>
 
 #include "detail/identifier.hpp"
 #include "detail/rmw_init_options_impl.hpp"
@@ -40,6 +41,7 @@ rmw_init_options_init(rmw_init_options_t * init_options, rcutils_allocator_t all
     return RMW_RET_INVALID_ARGUMENT;
   }
 
+  memset(init_options, 0, sizeof(rmw_init_options_t));
   init_options->instance_id = 0;
   init_options->implementation_identifier = rmw_zenoh_cpp::rmw_zenoh_identifier;
   init_options->allocator = allocator;
@@ -47,7 +49,6 @@ rmw_init_options_init(rmw_init_options_t * init_options, rcutils_allocator_t all
   init_options->enclave = nullptr;
   init_options->domain_id = RMW_DEFAULT_DOMAIN_ID;
   init_options->security_options = rmw_get_default_security_options();
-  init_options->localhost_only = RMW_LOCALHOST_ONLY_DEFAULT;
   init_options->discovery_options = rmw_get_zero_initialized_discovery_options();
   return rmw_discovery_options_init(&(init_options->discovery_options), 0, &allocator);
 }
@@ -76,9 +77,8 @@ rmw_init_options_copy(const rmw_init_options_t * src, rmw_init_options_t * dst)
   RCUTILS_CHECK_ALLOCATOR(&allocator, return RMW_RET_INVALID_ARGUMENT);
 
   rmw_init_options_t tmp;
-  tmp.instance_id = src->instance_id;
+  memcpy(&tmp, src, sizeof(rmw_init_options_t));
   tmp.implementation_identifier = rmw_zenoh_cpp::rmw_zenoh_identifier;
-  tmp.domain_id = src->domain_id;
   tmp.security_options = rmw_get_zero_initialized_security_options();
   rmw_ret_t ret =
     rmw_security_options_copy(&src->security_options, &allocator, &tmp.security_options);
@@ -89,7 +89,6 @@ rmw_init_options_copy(const rmw_init_options_t * src, rmw_init_options_t * dst)
     [&tmp, allocator]() {
       rmw_security_options_fini(&tmp.security_options, &allocator);
     });
-  tmp.localhost_only = src->localhost_only;
   tmp.discovery_options = rmw_get_zero_initialized_discovery_options();
   ret = rmw_discovery_options_copy(
     &src->discovery_options,