diff --git a/include/xrpl/protocol/Indexes.h b/include/xrpl/protocol/Indexes.h
index 13121fd758..0836cffaf7 100644
--- a/include/xrpl/protocol/Indexes.h
+++ b/include/xrpl/protocol/Indexes.h
@@ -148,7 +148,7 @@ next(Keylet const& k);
  */
 /** @{ */
 Keylet
-ticket(AccountID const& id, SeqProxy ticketSeq);
+ticket(AccountID const& id, SeqProxy const& ticketSeq);
 
 inline Keylet
 ticket(uint256 const& key)
@@ -373,7 +373,7 @@ loanBroker(uint256 const& key)
 }
 
 Keylet
-loan(uint256 const& loanBrokerID, SeqProxy loanSeq) noexcept;
+loan(uint256 const& loanBrokerID, SeqProxy const& loanSeq) noexcept;
 
 inline Keylet
 loan(uint256 const& key)
diff --git a/src/libxrpl/protocol/Indexes.cpp b/src/libxrpl/protocol/Indexes.cpp
index 7cc949a742..9ff2929e33 100644
--- a/src/libxrpl/protocol/Indexes.cpp
+++ b/src/libxrpl/protocol/Indexes.cpp
@@ -569,7 +569,7 @@ loanBroker(AccountID const& owner, SeqProxy const& seq) noexcept
 }
 
 Keylet
-loan(uint256 const& loanBrokerID, SeqProxy loanSeq) noexcept
+loan(uint256 const& loanBrokerID, SeqProxy const& loanSeq) noexcept
 {
     return loan(indexHash(LedgerNameSpace::Loan, loanBrokerID, loanSeq.value()));
 }