diff --git a/apps/emqx_lwm2m/rebar.config b/apps/emqx_lwm2m/rebar.config
index 8d5d54e7c..b32f6c71b 100644
--- a/apps/emqx_lwm2m/rebar.config
+++ b/apps/emqx_lwm2m/rebar.config
@@ -25,3 +25,4 @@
 {cover_enabled, true}.
 {cover_opts, [verbose]}.
 {cover_export_enabled, true}.
+{extra_src_dirs, [{"lwm2m_xml", [{recursive,true}]}]}.