diff --git a/src/core/main.c b/src/core/main.c
index 3baecc5f00..3c6b66e89c 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -1930,7 +1930,7 @@ static int initialize_runtime(
                         status_welcome();
                         hostname_setup();
                         machine_id_setup(NULL, arg_machine_id, NULL);
-                        loopback_setup();
+                        (void) loopback_setup();
                         bump_unix_max_dgram_qlen();
                         bump_file_max_and_nr_open();
                         test_usr();
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index f2f420c26f..734dee1130 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -3000,7 +3000,7 @@ static int inner_child(
                 return log_error_errno(errno, "setsid() failed: %m");
 
         if (arg_private_network)
-                loopback_setup();
+                (void) loopback_setup();
 
         if (arg_expose_ports) {
                 r = expose_port_send_rtnl(rtnl_socket);