diff --git a/doc/release-notes.md b/doc/release-notes.md
index 5ce2a9d66..c4faf2646 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -13,14 +13,14 @@ transactions. This is achieved by keeping track of and limiting the total
 `cost` and `evictionWeight` of all transactions in the mempool. The `cost` of a
 transaction is determined by its size in bytes, and its `evictionWeight` is a
 function of the transaction's `cost` and its fee. The maximum total cost is 
-configurable via the parameter `mempool.tx_cost_limit` which defaults to
+configurable via the parameter `mempooltxcostlimit` which defaults to
 80,000,000 (up to 20,000 txs). If a node's total mempool `cost` exceeds this
 limit the node will evict a random transaction, preferentially picking larger
 transactions and ones with below the standard fee. To prevent a node from
 re-accepting evicted transactions, it keeps track of ones that it has evicted
 recently. By default, a transaction will be considered recently evicted for 60
 minutes, but this can be configured with the parameter
-`mempool.eviction_memory_minutes`.
+`mempoolevictionmemoryminutes`.
 
 For full details see ZIP 401.
 
diff --git a/qa/rpc-tests/mempool_limit.py b/qa/rpc-tests/mempool_limit.py
index 1c424a47a..918c61414 100755
--- a/qa/rpc-tests/mempool_limit.py
+++ b/qa/rpc-tests/mempool_limit.py
@@ -26,11 +26,11 @@ class MempoolLimit(BitcoinTestFramework):
 
     def setup_nodes(self):
         extra_args = [
-            ["-debug=mempool", '-mempool.tx_cost_limit=8000'], # 2 transactions at min cost
-            ["-debug=mempool", '-mempool.tx_cost_limit=8000'], # 2 transactions at min cost
-            ["-debug=mempool", '-mempool.tx_cost_limit=8000'], # 2 transactions at min cost
+            ["-debug=mempool", '-mempooltxcostlimit=8000'], # 2 transactions at min cost
+            ["-debug=mempool", '-mempooltxcostlimit=8000'], # 2 transactions at min cost
+            ["-debug=mempool", '-mempooltxcostlimit=8000'], # 2 transactions at min cost
             # Let node 3 hold one more transaction
-            ["-debug=mempool", '-mempool.tx_cost_limit=12000'], # 3 transactions at min cost
+            ["-debug=mempool", '-mempooltxcostlimit=12000'], # 3 transactions at min cost
         ]
         return start_nodes(4, self.options.tmpdir, extra_args)
 
diff --git a/src/init.cpp b/src/init.cpp
index 11d956551..240396563 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -384,8 +384,8 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-maxconnections=<n>", strprintf(_("Maintain at most <n> connections to peers (default: %u)"), DEFAULT_MAX_PEER_CONNECTIONS));
     strUsage += HelpMessageOpt("-maxreceivebuffer=<n>", strprintf(_("Maximum per-connection receive buffer, <n>*1000 bytes (default: %u)"), 5000));
     strUsage += HelpMessageOpt("-maxsendbuffer=<n>", strprintf(_("Maximum per-connection send buffer, <n>*1000 bytes (default: %u)"), 1000));
-    strUsage += HelpMessageOpt("-mempool.eviction_memory_minutes=<n>", strprintf(_("The number of minutes before allowing rejected transactions to re-enter the mempool. (default: %u)"), DEFAULT_MEMPOOL_EVICTION_MEMORY_MINUTES));
-    strUsage += HelpMessageOpt("-mempool.tx_cost_limit=<n>",strprintf(_("An upper bound on the maximum size in bytes of all transactions in the mempool. (default: %s)"), DEFAULT_MEMPOOL_TOTAL_COST_LIMIT));
+    strUsage += HelpMessageOpt("-mempoolevictionmemoryminutes=<n>", strprintf(_("The number of minutes before allowing rejected transactions to re-enter the mempool. (default: %u)"), DEFAULT_MEMPOOL_EVICTION_MEMORY_MINUTES));
+    strUsage += HelpMessageOpt("-mempooltxcostlimit=<n>",strprintf(_("An upper bound on the maximum size in bytes of all transactions in the mempool. (default: %s)"), DEFAULT_MEMPOOL_TOTAL_COST_LIMIT));
     strUsage += HelpMessageOpt("-onion=<ip:port>", strprintf(_("Use separate SOCKS5 proxy to reach peers via Tor hidden services (default: %s)"), "-proxy"));
     strUsage += HelpMessageOpt("-onlynet=<net>", _("Only connect to nodes in network <net> (ipv4, ipv6 or onion)"));
     strUsage += HelpMessageOpt("-permitbaremultisig", strprintf(_("Relay non-P2SH multisig (default: %u)"), 1));
@@ -978,8 +978,8 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
         mempool.setSanityCheck(1.0 / ratio);
     }
 
-    int64_t mempoolTotalCostLimit = GetArg("-mempool.tx_cost_limit", DEFAULT_MEMPOOL_TOTAL_COST_LIMIT);
-    int64_t mempoolEvictionMemorySeconds = GetArg("-mempool.eviction_memory_minutes", DEFAULT_MEMPOOL_EVICTION_MEMORY_MINUTES) * 60;
+    int64_t mempoolTotalCostLimit = GetArg("-mempooltxcostlimit", DEFAULT_MEMPOOL_TOTAL_COST_LIMIT);
+    int64_t mempoolEvictionMemorySeconds = GetArg("-mempoolevictionmemoryminutes", DEFAULT_MEMPOOL_EVICTION_MEMORY_MINUTES) * 60;
     mempool.SetMempoolCostLimit(mempoolTotalCostLimit, mempoolEvictionMemorySeconds);
 
     fCheckBlockIndex = GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());