diff --git a/src/kits/app/app.src b/src/kits/app/app.src
index 63a3137275..861e3556d3 100644
--- a/src/kits/app/app.src
+++ b/src/kits/app/app.src
@@ -12,6 +12,7 @@ APP_KIT_SOURCE =
 	Messenger.cpp
 	PropertyInfo.cpp
 	RegistrarDefs.cpp
+	RegistrarThread.cpp
 	Roster.cpp
 	TokenSpace.cpp
 ;