diff --git a/src/xrpld/app/main/Main.cpp b/src/xrpld/app/main/Main.cpp
index f3953823dd..a02c54c1bc 100644
--- a/src/xrpld/app/main/Main.cpp
+++ b/src/xrpld/app/main/Main.cpp
@@ -121,7 +121,7 @@ printHelp(po::options_description const& desc)
                  "]]] [binary]\n"
                  "     book_changes [<ledger hash|id>]\n"
                  "     book_offers <taker_pays> <taker_gets> [<taker [<ledger> "
-                 "[<limit> [<proof> [<marker>]]]]]\n"
+                 "[<limit> [<marker>]]]]\n"
                  "     can_delete [<ledgerid>|<ledgerhash>|now|always|never]\n"
                  "     channel_authorize <private_key> <channel_id> <drops>\n"
                  "     channel_verify <public_key> <channel_id> <drops> <signature>\n"
diff --git a/src/xrpld/rpc/detail/RPCCall.cpp b/src/xrpld/rpc/detail/RPCCall.cpp
index c94b7d3f7a..5dd5a41179 100644
--- a/src/xrpld/rpc/detail/RPCCall.cpp
+++ b/src/xrpld/rpc/detail/RPCCall.cpp
@@ -351,7 +351,7 @@ private:
     }
 
     // book_offers <taker_pays> <taker_gets> [<taker> [<ledger> [<limit>
-    // [<proof> [<marker>]]]]] limit: 0 = no limit proof: 0 or 1
+    // [<marker>]]]] limit: 0 = no limit
     //
     // Mnemonic: taker pays --> offer --> taker gets
     Json::Value