diff --git a/src/test/app/vault/VaultBugs_test.cpp b/src/test/app/vault/VaultBugs_test.cpp
index e2c216c764..7777ffb6d5 100644
--- a/src/test/app/vault/VaultBugs_test.cpp
+++ b/src/test/app/vault/VaultBugs_test.cpp
@@ -20,6 +20,7 @@
 #include <xrpl/protocol/Indexes.h>
 #include <xrpl/protocol/Issue.h>
 #include <xrpl/protocol/MPTIssue.h>
+#include <xrpl/protocol/Protocol.h>
 #include <xrpl/protocol/SField.h>
 #include <xrpl/protocol/STAmount.h>
 #include <xrpl/protocol/TER.h>