diff --git a/src/test/app/Vault_test.cpp b/src/test/app/Vault_test.cpp
index 49a7b081a6..5f7664db34 100644
--- a/src/test/app/Vault_test.cpp
+++ b/src/test/app/Vault_test.cpp
@@ -28,6 +28,7 @@
 
 #include <xrpl/basics/Number.h>
 #include <xrpl/basics/base_uint.h>
+#include <xrpl/basics/chrono.h>
 #include <xrpl/basics/strHex.h>
 #include <xrpl/beast/unit_test/suite.h>
 #include <xrpl/beast/utility/Journal.h>