diff --git a/src/platform/nm-linux-platform.c b/src/platform/nm-linux-platform.c
index f182dc637..74b2d5a96 100644
--- a/src/platform/nm-linux-platform.c
+++ b/src/platform/nm-linux-platform.c
@@ -8634,16 +8634,9 @@ ip_route_add(NMPlatform *             platform,
     nm_auto_nlmsg struct nl_msg *nlmsg = NULL;
     NMPObject                    obj;
 
-    switch (addr_family) {
-    case AF_INET:
-        nmp_object_stackinit(&obj, NMP_OBJECT_TYPE_IP4_ROUTE, (const NMPlatformObject *) route);
-        break;
-    case AF_INET6:
-        nmp_object_stackinit(&obj, NMP_OBJECT_TYPE_IP6_ROUTE, (const NMPlatformObject *) route);
-        break;
-    default:
-        nm_assert_not_reached();
-    }
+    nmp_object_stackinit(&obj,
+                         NMP_OBJECT_TYPE_IP_ROUTE(NM_IS_IPv4(addr_family)),
+                         (const NMPlatformObject *) route);
 
     nm_platform_ip_route_normalize(addr_family, NMP_OBJECT_CAST_IP_ROUTE(&obj));