diff --git a/lib/documentmanagement/DocumentTransaction.inc b/lib/documentmanagement/DocumentTransaction.inc
index 770adac..78e05be 100644
--- a/lib/documentmanagement/DocumentTransaction.inc
+++ b/lib/documentmanagement/DocumentTransaction.inc
@@ -8,6 +8,7 @@ DEFINE("MOVE", 5);
 DEFINE("DOWNLOAD", 6);
 DEFINE("CHECKIN", 7);
 DEFINE("CHECKOUT", 8);
+DEFINE("COLLAB_ROLLBACK",9);
 
 /**
 *