diff --git a/microwatt.core b/microwatt.core
index 6efe7c9..2bc428c 100644
--- a/microwatt.core
+++ b/microwatt.core
@@ -28,6 +28,7 @@ filesets:
       - wishbone_debug_master.vhdl
       - core.vhdl
       - icache.vhdl
+      - core_debug.vhdl
     file_type : vhdlSource-2008
 
   soc: