diff --git a/reference_detector.xml b/reference_detector.xml
index ce8b1bf2f98b39bea770ca4e63229cc3845fe3d2..641953b2456efe900f61b7528278435872a0e28a 100644
--- a/reference_detector.xml
+++ b/reference_detector.xml
@@ -130,9 +130,9 @@
   <include ref="compact/hcal.xml"/>
   <include ref="compact/forward_rich.xml"/>
 
-  <!--
+  
   <include ref="compact/ffi_ZDC_HCAL.xml"/>
-  -->
+  
 
   <!--
   <include ref="compact/ci_GEM.xml"/>