diff --git a/src/ripple/app/tx/impl/CancelTicket.cpp b/src/ripple/app/tx/impl/CancelTicket.cpp
index 9f8bb0a2d..7e301ee9c 100644
--- a/src/ripple/app/tx/impl/CancelTicket.cpp
+++ b/src/ripple/app/tx/impl/CancelTicket.cpp
@@ -22,6 +22,7 @@
 #include <ripple/basics/Log.h>
 #include <ripple/protocol/Feature.h>
 #include <ripple/protocol/Indexes.h>
+#include <ripple/protocol/TxFlags.h>
 #include <ripple/ledger/View.h>
 
 namespace ripple {
@@ -32,6 +33,9 @@ CancelTicket::preflight (PreflightContext const& ctx)
     if (! ctx.rules.enabled(featureTickets))
         return temDISABLED;
 
+    if (ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     auto const ret = preflight1 (ctx);
     if (!isTesSuccess (ret))
         return ret;
diff --git a/src/ripple/app/tx/impl/CreateTicket.cpp b/src/ripple/app/tx/impl/CreateTicket.cpp
index 0e642e45e..8a1325501 100644
--- a/src/ripple/app/tx/impl/CreateTicket.cpp
+++ b/src/ripple/app/tx/impl/CreateTicket.cpp
@@ -23,6 +23,7 @@
 #include <ripple/basics/Log.h>
 #include <ripple/protocol/Feature.h>
 #include <ripple/protocol/Indexes.h>
+#include <ripple/protocol/TxFlags.h>
 
 namespace ripple {
 
@@ -32,6 +33,9 @@ CreateTicket::preflight (PreflightContext const& ctx)
     if (! ctx.rules.enabled(featureTickets))
         return temDISABLED;
 
+    if (ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     auto const ret = preflight1 (ctx);
     if (!isTesSuccess (ret))
         return ret;
diff --git a/src/ripple/app/tx/impl/Escrow.cpp b/src/ripple/app/tx/impl/Escrow.cpp
index 2c47a85e6..6432bd756 100644
--- a/src/ripple/app/tx/impl/Escrow.cpp
+++ b/src/ripple/app/tx/impl/Escrow.cpp
@@ -99,6 +99,9 @@ EscrowCreate::preflight (PreflightContext const& ctx)
     if (! ctx.rules.enabled(featureEscrow))
         return temDISABLED;
 
+    if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     auto const ret = preflight1 (ctx);
     if (!isTesSuccess (ret))
         return ret;
@@ -297,6 +300,9 @@ EscrowFinish::preflight (PreflightContext const& ctx)
     if (! ctx.rules.enabled(featureEscrow))
         return temDISABLED;
 
+    if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     {
         auto const ret = preflight1 (ctx);
         if (!isTesSuccess (ret))
@@ -504,6 +510,9 @@ EscrowCancel::preflight (PreflightContext const& ctx)
     if (! ctx.rules.enabled(featureEscrow))
         return temDISABLED;
 
+    if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     auto const ret = preflight1 (ctx);
     if (!isTesSuccess (ret))
         return ret;
diff --git a/src/ripple/app/tx/impl/PayChan.cpp b/src/ripple/app/tx/impl/PayChan.cpp
index 79ba673fe..24a949b78 100644
--- a/src/ripple/app/tx/impl/PayChan.cpp
+++ b/src/ripple/app/tx/impl/PayChan.cpp
@@ -161,6 +161,9 @@ PayChanCreate::preflight (PreflightContext const& ctx)
     if (!ctx.rules.enabled (featurePayChan))
         return temDISABLED;
 
+    if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     auto const ret = preflight1 (ctx);
     if (!isTesSuccess (ret))
         return ret;
@@ -266,6 +269,9 @@ PayChanFund::preflight (PreflightContext const& ctx)
     if (!ctx.rules.enabled (featurePayChan))
         return temDISABLED;
 
+    if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
+        return temINVALID_FLAG;
+
     auto const ret = preflight1 (ctx);
     if (!isTesSuccess (ret))
         return ret;
@@ -370,9 +376,15 @@ PayChanClaim::preflight (PreflightContext const& ctx)
             return tecNO_PERMISSION;
     }
 
-    auto const flags = ctx.tx.getFlags ();
-    if ((flags & tfClose) && (flags & tfRenew))
-        return temMALFORMED;
+    {
+        auto const flags = ctx.tx.getFlags();
+
+        if (ctx.rules.enabled(fix1543) && (flags & tfPayChanClaimMask))
+            return temINVALID_FLAG;
+
+        if ((flags & tfClose) && (flags & tfRenew))
+            return temMALFORMED;
+    }
 
     if (auto const sig = ctx.tx[~sfSignature])
     {
diff --git a/src/ripple/protocol/Feature.h b/src/ripple/protocol/Feature.h
index 16c3abc35..151fd33f0 100644
--- a/src/ripple/protocol/Feature.h
+++ b/src/ripple/protocol/Feature.h
@@ -76,7 +76,8 @@ class FeatureCollections
         "fix1528",
         "DepositAuth",
         "Checks",
-        "fix1571"
+        "fix1571",
+        "fix1543",
     };
 
     std::vector<uint256> features;
@@ -359,6 +360,7 @@ extern uint256 const fix1528;
 extern uint256 const featureDepositAuth;
 extern uint256 const featureChecks;
 extern uint256 const fix1571;
+extern uint256 const fix1543;
 
 } // ripple
 
diff --git a/src/ripple/protocol/TxFlags.h b/src/ripple/protocol/TxFlags.h
index e09f5f0c6..575788e74 100644
--- a/src/ripple/protocol/TxFlags.h
+++ b/src/ripple/protocol/TxFlags.h
@@ -96,9 +96,10 @@ const std::uint32_t tfTrustSetMask         = ~ (tfUniversal | tfSetfAuth | tfSet
 const std::uint32_t tfGotMajority          = 0x00010000;
 const std::uint32_t tfLostMajority         = 0x00020000;
 
-// PaymentChannel flags:
+// PaymentChannelClaim flags:
 const std::uint32_t tfRenew                = 0x00010000;
 const std::uint32_t tfClose                = 0x00020000;
+const std::uint32_t tfPayChanClaimMask     = ~ (tfUniversal | tfRenew | tfClose);
 
 } // ripple
 
diff --git a/src/ripple/protocol/impl/Feature.cpp b/src/ripple/protocol/impl/Feature.cpp
index 0d6389b8d..3df6e72bc 100644
--- a/src/ripple/protocol/impl/Feature.cpp
+++ b/src/ripple/protocol/impl/Feature.cpp
@@ -109,7 +109,8 @@ detail::supportedAmendments ()
         { "1D3463A5891F9E589C5AE839FFAC4A917CE96197098A1EF22304E1BC5B98A454 fix1528" },
         { "F64E1EABBE79D55B3BB82020516CEC2C582A98A6BFE20FBE9BB6A0D233418064 DepositAuth"},
         { "157D2D480E006395B76F948E3E07A45A05FE10230D88A7993C71F97AE4B1F2D1 Checks"},
-        { "7117E2EC2DBF119CA55181D69819F1999ECEE1A0225A7FD2B9ED47940968479C fix1571" }
+        { "7117E2EC2DBF119CA55181D69819F1999ECEE1A0225A7FD2B9ED47940968479C fix1571" },
+        { "CA7C02118BA27599528543DFE77BA6838D1B0F43B447D4D7F53523CE6A0E9AC2 fix1543" }
     };
     return supported;
 }
@@ -160,5 +161,6 @@ uint256 const fix1528 = *getRegisteredFeature("fix1528");
 uint256 const featureDepositAuth = *getRegisteredFeature("DepositAuth");
 uint256 const featureChecks = *getRegisteredFeature("Checks");
 uint256 const fix1571 = *getRegisteredFeature("fix1571");
+uint256 const fix1543 = *getRegisteredFeature("fix1543");
 
 } // ripple