diff --git a/src/cpp/ripple/OrderBookDB.cpp b/src/cpp/ripple/OrderBookDB.cpp
index 93da712b76..ab95082d81 100644
--- a/src/cpp/ripple/OrderBookDB.cpp
+++ b/src/cpp/ripple/OrderBookDB.cpp
@@ -181,6 +181,7 @@ void OrderBookDB::processTxn(const SerializedTransaction& stTxn, TER terResult,T
 					{
 						field=&sfNewFields;
 					}
+					// FIXME: What if an order is deleted?
 
 					if (field)
 					{