diff --git a/libnm/nm-object.c b/libnm/nm-object.c
index 1e8d83eb02..01c7b936b6 100644
--- a/libnm/nm-object.c
+++ b/libnm/nm-object.c
@@ -1202,6 +1202,8 @@ set_property (GObject *object, guint prop_id,
 	case PROP_DBUS_OBJECT:
 		/* Construct only */
 		priv->object = g_value_dup_object (value);
+		if (!priv->object)
+			g_return_if_reached ();
 		break;
 	case PROP_DBUS_OBJECT_MANAGER:
 		/* Construct only */