diff --git a/src/test/app/Vault_test.cpp b/src/test/app/Vault_test.cpp
index 48c97d14c8..a00eff2598 100644
--- a/src/test/app/Vault_test.cpp
+++ b/src/test/app/Vault_test.cpp
@@ -7544,7 +7544,7 @@ class Vault_test : public beast::unit_test::Suite
         // Transaction fails if the data field is set, but is empty
         {
             testcase("VaultDelete memo data featureLendingProtocolV1_1 enabled data empty");
-            delTx[sfMemoData] = strHex(std::string(0, 'A'));
+            delTx[sfMemoData] = strHex(std::string{});
             env(delTx, Ter(temMALFORMED));
             env.close();
         }