diff --git a/src/platform/nm-platform.c b/src/platform/nm-platform.c
index 07ec4cf0b..69b0d420c 100644
--- a/src/platform/nm-platform.c
+++ b/src/platform/nm-platform.c
@@ -4261,7 +4261,7 @@ nm_platform_class_init (NMPlatformClass *platform_class)
 	g_object_class_install_property
 	 (object_class, PROP_NETNS_SUPPORT,
 	     g_param_spec_boolean (NM_PLATFORM_NETNS_SUPPORT, "", "",
-	                           FALSE,
+	                           NM_PLATFORM_NETNS_SUPPORT_DEFAULT,
 	                           G_PARAM_WRITABLE |
 	                           G_PARAM_CONSTRUCT_ONLY |
 	                           G_PARAM_STATIC_STRINGS));
diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index 10fe282db..9f055b042 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -40,6 +40,8 @@
 #define NM_IS_PLATFORM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), NM_TYPE_PLATFORM))
 #define NM_PLATFORM_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), NM_TYPE_PLATFORM, NMPlatformClass))
 
+#define NM_PLATFORM_NETNS_SUPPORT_DEFAULT    FALSE
+
 /******************************************************************/
 
 #define NM_PLATFORM_NETNS_SUPPORT      "netns-support"