diff --git a/src/dash-tx.cpp b/src/dash-tx.cpp
index b57504c968..ed30ace65e 100644
--- a/src/dash-tx.cpp
+++ b/src/dash-tx.cpp
@@ -237,7 +237,7 @@ static void MutateTxAddInput(CMutableTransaction& tx, const std::string& strInpu
         throw std::runtime_error("invalid TX input vout '" + strVout + "'");
 
     // extract the optional sequence number
-    uint32_t nSequenceIn=std::numeric_limits<unsigned int>::max();
+    uint32_t nSequenceIn = CTxIn::SEQUENCE_FINAL;
     if (vStrInputParts.size() > 2)
         nSequenceIn = std::stoul(vStrInputParts[2]);
 
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 63b58f6967..4f2d61a1b2 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -400,10 +400,9 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
     UniValue outputs = outputs_is_obj ? outputs_in.get_obj() : outputs_in.get_array();
 
     CMutableTransaction rawTx;
-
     if (!locktime.isNull()) {
         int64_t nLockTime = locktime.get_int64();
-        if (nLockTime < 0 || nLockTime > std::numeric_limits<uint32_t>::max())
+        if (nLockTime < 0 || nLockTime > LOCKTIME_MAX)
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, locktime out of range");
         rawTx.nLockTime = nLockTime;
     }
@@ -421,13 +420,13 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
         if (nOutput < 0)
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, vout must be positive");
 
-        uint32_t nSequence = (rawTx.nLockTime ? std::numeric_limits<uint32_t>::max() - 1 : std::numeric_limits<uint32_t>::max());
+        uint32_t nSequence = (rawTx.nLockTime ? CTxIn::SEQUENCE_FINAL - 1 : CTxIn::SEQUENCE_FINAL);
 
         // set the sequence number if passed in the parameters object
         const UniValue& sequenceObj = find_value(o, "sequence");
         if (sequenceObj.isNum()) {
             int64_t seqNr64 = sequenceObj.get_int64();
-            if (seqNr64 < 0 || seqNr64 > std::numeric_limits<uint32_t>::max())
+            if (seqNr64 < 0 || seqNr64 > CTxIn::SEQUENCE_FINAL)
                 throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, sequence number is out of range");
             else
                 nSequence = (uint32_t)seqNr64;
diff --git a/src/script/script.h b/src/script/script.h
index 39e1f134fa..c1514e1aa0 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -38,6 +38,12 @@ static const int MAX_STACK_SIZE = 1000;
 // otherwise as UNIX timestamp.
 static const unsigned int LOCKTIME_THRESHOLD = 500000000; // Tue Nov  5 00:53:20 1985 UTC
 
+// Maximum nLockTime. Since a lock time indicates the last invalid timestamp, a
+// transaction with this lock time will never be valid unless lock time
+// checking is disabled (by setting all input sequence numbers to
+// SEQUENCE_FINAL).
+static const uint32_t LOCKTIME_MAX = 0xFFFFFFFFU;
+
 template <typename T>
 std::vector<unsigned char> ToByteVector(const T& in)
 {
diff --git a/src/test/skiplist_tests.cpp b/src/test/skiplist_tests.cpp
index 3c8baf4139..e88c0203b6 100644
--- a/src/test/skiplist_tests.cpp
+++ b/src/test/skiplist_tests.cpp
@@ -170,7 +170,6 @@ BOOST_AUTO_TEST_CASE(findearliestatleast_edge_test)
     BOOST_CHECK_EQUAL(chain.FindEarliestAtLeast(-1)->nHeight, 0);
 
     BOOST_CHECK_EQUAL(chain.FindEarliestAtLeast(std::numeric_limits<int64_t>::min())->nHeight, 0);
-    BOOST_CHECK_EQUAL(chain.FindEarliestAtLeast(std::numeric_limits<unsigned int>::min())->nHeight, 0);
     BOOST_CHECK_EQUAL(chain.FindEarliestAtLeast(-int64_t(std::numeric_limits<unsigned int>::max()) - 1)->nHeight, 0);
     BOOST_CHECK(!chain.FindEarliestAtLeast(std::numeric_limits<int64_t>::max()));
     BOOST_CHECK(!chain.FindEarliestAtLeast(std::numeric_limits<unsigned int>::max()));