diff --git a/src/validation.cpp b/src/validation.cpp
index ab44e73d7..bce8c4f9e 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -729,7 +729,7 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
 
         // No transactions are allowed below minRelayTxFee except from disconnected blocks
         if (!bypass_limits && nModifiedFees < ::minRelayTxFee.GetFee(nSize)) {
-            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "min relay fee not met");
+            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "min relay fee not met", false, strprintf("%d < %d", nModifiedFees, ::minRelayTxFee.GetFee(nSize)));
         }
 
         if (nAbsurdFee && nFees > nAbsurdFee)
diff --git a/test/functional/mining_prioritisetransaction.py b/test/functional/mining_prioritisetransaction.py
index e754dd31a..b433f11aa 100755
--- a/test/functional/mining_prioritisetransaction.py
+++ b/test/functional/mining_prioritisetransaction.py
@@ -120,7 +120,7 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
         tx_id = self.nodes[0].decoderawtransaction(tx_hex)["txid"]
 
         # This will raise an exception due to min relay fee not being met
-        assert_raises_rpc_error(-26, "min relay fee not met (code 66)", self.nodes[0].sendrawtransaction, tx_hex)
+        assert_raises_rpc_error(-26, "min relay fee not met, 0 < 134 (code 66)", self.nodes[0].sendrawtransaction, tx_hex)
         assert(tx_id not in self.nodes[0].getrawmempool())
 
         # This is a less than 1000-byte transaction, so just set the fee