diff --git a/include/xrpl/protocol/UintTypes.h b/include/xrpl/protocol/UintTypes.h
index 9a7284158e..c95ee41ded 100644
--- a/include/xrpl/protocol/UintTypes.h
+++ b/include/xrpl/protocol/UintTypes.h
@@ -61,7 +61,8 @@ using NodeID = base_uint<160, detail::NodeIDTag>;
 /** MPTID is a 192-bit value representing MPT Issuance ID,
  * which is a concatenation of a 32-bit sequence (big endian)
  * and a 160-bit account */
-using MPTID = base_uint<192>;
+// TODO - edhennis - Add a tag
+using MPTID = uint192;
 
 /** XRP currency. */
 Currency const&
diff --git a/src/xrpld/app/tx/detail/MPTokenAuthorize.h b/src/xrpld/app/tx/detail/MPTokenAuthorize.h
index ef35e78e76..e869ac43dc 100644
--- a/src/xrpld/app/tx/detail/MPTokenAuthorize.h
+++ b/src/xrpld/app/tx/detail/MPTokenAuthorize.h
@@ -27,7 +27,7 @@ namespace ripple {
 struct MPTAuthorizeArgs
 {
     XRPAmount const& priorBalance;
-    uint192 const& mptIssuanceID;
+    MPTID const& mptIssuanceID;
     AccountID const& accountID;
     std::uint32_t flags{};
     std::optional<AccountID> holderID{};
diff --git a/src/xrpld/app/tx/detail/VaultCreate.cpp b/src/xrpld/app/tx/detail/VaultCreate.cpp
index 65876d6cb4..f364e8a2a5 100644
--- a/src/xrpld/app/tx/detail/VaultCreate.cpp
+++ b/src/xrpld/app/tx/detail/VaultCreate.cpp
@@ -142,7 +142,9 @@ VaultCreate::doApply()
         view(),
         j_,
         {
-            .account = pseudoId,
+            // The operator-> gives the underlying STAccount,
+            // whose value function returns a const&.
+            .account = pseudoId->value(),
             .sequence = 1,
             .flags = mptFlags,
             .metadata = tx[~sfMPTokenMetadata],
diff --git a/src/xrpld/app/tx/detail/VaultDelete.cpp b/src/xrpld/app/tx/detail/VaultDelete.cpp
index b999c277cf..84140403eb 100644
--- a/src/xrpld/app/tx/detail/VaultDelete.cpp
+++ b/src/xrpld/app/tx/detail/VaultDelete.cpp
@@ -71,7 +71,9 @@ VaultDelete::doApply()
     if (auto ter = MPTokenIssuanceDestroy::destroy(
             view(),
             j_,
-            {.account = vault->at(sfAccount),
+            // The operator-> gives the underlying STAccount,
+            // whose value function returns a const&.
+            {.account = vault->at(sfAccount)->value(),
              .issuanceID = vault->at(sfMPTokenIssuanceID)}))
         return ter;
 
diff --git a/src/xrpld/app/tx/detail/VaultDeposit.cpp b/src/xrpld/app/tx/detail/VaultDeposit.cpp
index 1561b4487e..10da4e8f3a 100644
--- a/src/xrpld/app/tx/detail/VaultDeposit.cpp
+++ b/src/xrpld/app/tx/detail/VaultDeposit.cpp
@@ -122,7 +122,9 @@ VaultDeposit::doApply()
                     view(),
                     ctx_.journal,
                     {.priorBalance = mPriorBalance,
-                     .mptIssuanceID = mptIssuanceID,
+                     // The operator-> gives the underlying STUInt192
+                     // whose value function returns a const&.
+                     .mptIssuanceID = mptIssuanceID->value(),
                      .accountID = account_});
                 !isTesSuccess(err))
                 return err;