diff --git a/src/policy/policy.cpp b/src/policy/policy.cpp
index 7b2b23964..506eb6f17 100644
--- a/src/policy/policy.cpp
+++ b/src/policy/policy.cpp
@@ -209,7 +209,7 @@ bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
 CFeeRate incrementalRelayFee = CFeeRate(DEFAULT_INCREMENTAL_RELAY_FEE);
 CFeeRate dustRelayFee = CFeeRate(DUST_RELAY_TX_FEE);
 unsigned int nBytesPerSigOp = DEFAULT_BYTES_PER_SIGOP;
-unsigned int nDustLimit = DEFAULT_DUST_LIMIT;
+CAmount nDustLimit = DEFAULT_DUST_LIMIT;
 
 int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost)
 {
diff --git a/src/policy/policy.h b/src/policy/policy.h
index 5380f7b5b..a41d2fe5f 100644
--- a/src/policy/policy.h
+++ b/src/policy/policy.h
@@ -103,7 +103,7 @@ bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
 extern CFeeRate incrementalRelayFee;
 extern CFeeRate dustRelayFee;
 extern unsigned int nBytesPerSigOp;
-extern unsigned int nDustLimit;
+extern CAmount nDustLimit;
 
 /** Compute the virtual transaction size (weight reinterpreted as bytes). */
 int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost);
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index 0d0ceda54..63e34697a 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -15,7 +15,8 @@ static const int SERIALIZE_TRANSACTION_NO_WITNESS = 0x40000000;
 
 static const int WITNESS_SCALE_FACTOR = 4;
 
-extern unsigned int nDustLimit;
+/** An amount smaller than this is considered dust */
+extern CAmount nDustLimit;
 
 /** An outpoint - a combination of a transaction hash and an index n into its vout */
 class COutPoint
diff --git a/src/wallet/test/wallet_tests.cpp b/src/wallet/test/wallet_tests.cpp
index 79a994bf6..a72e1ce09 100644
--- a/src/wallet/test/wallet_tests.cpp
+++ b/src/wallet/test/wallet_tests.cpp
@@ -36,7 +36,7 @@ std::vector<std::unique_ptr<CWalletTx>> wtxn;
 
 typedef set<pair<const CWalletTx*,unsigned int> > CoinSet;
 
-extern unsigned int nDustLimit;
+extern CAmount nDustLimit;
 
 BOOST_FIXTURE_TEST_SUITE(wallet_tests, WalletTestingSetup)