diff --git a/payload_generator/annotated_operation.cc b/payload_generator/annotated_operation.cc
index 3f28c8d..3fbea2c 100644
--- a/payload_generator/annotated_operation.cc
+++ b/payload_generator/annotated_operation.cc
@@ -64,6 +64,8 @@
       return "ZERO";
     case InstallOperation::DISCARD:
       return "DISCARD";
+    case InstallOperation::REPLACE_XZ:
+      return "REPLACE_XZ";
   }
   return "UNK";
 }