diff --git a/src/cpp/ripple/ripple_DBInit.cpp b/src/cpp/ripple/ripple_DBInit.cpp
index bd6cbbd79b..8639fe035b 100644
--- a/src/cpp/ripple/ripple_DBInit.cpp
+++ b/src/cpp/ripple/ripple_DBInit.cpp
@@ -250,6 +250,7 @@ const char* WalletDBInit[] =
     // Score:
     //  Computed trust score.  Higher is better.
     // Source:
+    //  'C' = Configuration file
     //  'V' = Validation file
     //  'M' = Manually added.
     //  'I' = Inbound connection.