diff --git a/src/test/app/lending/LoanBroker_test.cpp b/src/test/app/lending/LoanBroker_test.cpp
index 4f46a47453..2b05dada88 100644
--- a/src/test/app/lending/LoanBroker_test.cpp
+++ b/src/test/app/lending/LoanBroker_test.cpp
@@ -59,6 +59,7 @@
 #include <functional>
 #include <memory>
 #include <optional>
+#include <string>
 #include <string_view>
 #include <tuple>
 #include <utility>