diff --git a/src/xrpld/app/tx/detail/LoanPay.cpp b/src/xrpld/app/tx/detail/LoanPay.cpp
index 64d7f8f518..edbe192632 100644
--- a/src/xrpld/app/tx/detail/LoanPay.cpp
+++ b/src/xrpld/app/tx/detail/LoanPay.cpp
@@ -23,6 +23,7 @@
 #include <xrpld/app/tx/detail/LoanManage.h>
 
 #include <xrpl/json/to_string.h>
+#include <xrpl/protocol/TxFlags.h>
 
 namespace ripple {