diff --git a/rebar.config b/rebar.config
index e128c47d2..c68a1f394 100644
--- a/rebar.config
+++ b/rebar.config
@@ -19,6 +19,7 @@
 
 {sub_dirs, [
     "rel", 
+    "apps/emqtt",
     "apps/emqttd"]}.
 
 {deps, [