diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -359,6 +359,7 @@
 	clientversion.cpp
 	compat/glibcxx_sanity.cpp
 	compat/strnlen.cpp
+	currencyunit.cpp
 	fs.cpp
 	interfaces/handler.cpp
 	logging.cpp
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -9,6 +9,7 @@
 
 #include <chainparamsbase.h>
 #include <clientversion.h>
+#include <currencyunit.h>
 #include <rpc/client.h>
 #include <rpc/protocol.h>
 #include <rpc/request.h>
@@ -48,6 +49,7 @@
     const auto regtestBaseParams =
         CreateBaseChainParams(CBaseChainParams::REGTEST);
 
+    SetupCurrencyUnitOptions(argsman);
     argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY,
                    OptionsCategory::OPTIONS);
     argsman.AddArg(
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -11,6 +11,7 @@
 #include <coins.h>
 #include <consensus/consensus.h>
 #include <core_io.h>
+#include <currencyunit.h>
 #include <key_io.h>
 #include <primitives/transaction.h>
 #include <rpc/util.h>
@@ -40,6 +41,7 @@
 static void SetupBitcoinTxArgs(ArgsManager &argsman) {
     SetupHelpOptions(argsman);
 
+    SetupCurrencyUnitOptions(argsman);
     argsman.AddArg("-create", "Create new, empty TX.", ArgsManager::ALLOW_ANY,
                    OptionsCategory::OPTIONS);
     argsman.AddArg("-json", "Select JSON output", ArgsManager::ALLOW_ANY,
diff --git a/src/bitcoin-wallet.cpp b/src/bitcoin-wallet.cpp
--- a/src/bitcoin-wallet.cpp
+++ b/src/bitcoin-wallet.cpp
@@ -8,6 +8,7 @@
 
 #include <chainparams.h>
 #include <chainparamsbase.h>
+#include <currencyunit.h>
 #include <logging.h>
 #include <util/system.h>
 #include <util/translation.h>
@@ -20,6 +21,7 @@
 static void SetupWalletToolArgs(ArgsManager &argsman) {
     SetupHelpOptions(argsman);
     SetupChainParamsBaseOptions(argsman);
+    SetupCurrencyUnitOptions(argsman);
 
     argsman.AddArg("-datadir=<dir>", "Specify data directory",
                    ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -9,6 +9,7 @@
 #include <chainparamsconstants.h>
 #include <chainparamsseeds.h>
 #include <consensus/merkle.h>
+#include <currencyunit.h>
 #include <network.h>
 #include <tinyformat.h>
 #include <util/strencodings.h>
@@ -204,7 +205,7 @@
         base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
         base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};
         cashaddrPrefix =
-            gArgs.GetBoolArg("-ecash", false) ? "ecash" : "bitcoincash";
+            gArgs.GetBoolArg("-ecash", DEFAULT_ECASH) ? "ecash" : "bitcoincash";
 
         vFixedSeeds = std::vector<SeedSpec6>(
             pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));
@@ -352,7 +353,7 @@
         base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
         base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
         cashaddrPrefix =
-            gArgs.GetBoolArg("-ecash", false) ? "ectest" : "bchtest";
+            gArgs.GetBoolArg("-ecash", DEFAULT_ECASH) ? "ectest" : "bchtest";
 
         vFixedSeeds = std::vector<SeedSpec6>(
             pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));
@@ -485,7 +486,7 @@
         base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
         base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
         cashaddrPrefix =
-            gArgs.GetBoolArg("-ecash", false) ? "ecregtest" : "bchreg";
+            gArgs.GetBoolArg("-ecash", DEFAULT_ECASH) ? "ecregtest" : "bchreg";
     }
 };
 
diff --git a/src/currencyunit.h b/src/currencyunit.h
new file mode 100644
--- /dev/null
+++ b/src/currencyunit.h
@@ -0,0 +1,14 @@
+// Copyright (c) 2021 The Bitcoin Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_CURRENCYUNIT_H
+#define BITCOIN_CURRENCYUNIT_H
+
+class ArgsManager;
+
+constexpr bool DEFAULT_ECASH = false;
+
+void SetupCurrencyUnitOptions(ArgsManager &argsman);
+
+#endif // BITCOIN_CURRENCYUNIT_H
diff --git a/src/currencyunit.cpp b/src/currencyunit.cpp
new file mode 100644
--- /dev/null
+++ b/src/currencyunit.cpp
@@ -0,0 +1,15 @@
+// Copyright (c) 2021 The Bitcoin Developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <currencyunit.h>
+
+#include <util/system.h>
+
+void SetupCurrencyUnitOptions(ArgsManager &argsman) {
+    // whether to use eCash default unit and address prefix
+    argsman.AddArg("-ecash",
+                   strprintf("Use ecash as default unit (default: %s)",
+                             DEFAULT_ECASH ? "true" : "false"),
+                   ArgsManager::ALLOW_BOOL, OptionsCategory::OPTIONS);
+}
diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -23,6 +23,7 @@
 #include <compat/sanity.h>
 #include <config.h>
 #include <consensus/validation.h>
+#include <currencyunit.h>
 #include <flatfile.h>
 #include <fs.h>
 #include <hash.h>
@@ -381,13 +382,11 @@
     ArgsManager &argsman = *node.args;
 
     SetupHelpOptions(argsman);
+    SetupCurrencyUnitOptions(argsman);
     // server-only for now
     argsman.AddArg("-help-debug",
                    "Print help message with debugging options and exit", false,
                    OptionsCategory::DEBUG_TEST);
-    // whether to use eCash default unit and address prefix
-    argsman.AddArg("-ecash", "Use ecash as default unit (Default: false)",
-                   ArgsManager::ALLOW_BOOL, OptionsCategory::OPTIONS);
 
     const auto defaultBaseParams =
         CreateBaseChainParams(CBaseChainParams::MAIN);
diff --git a/src/minerfund.cpp b/src/minerfund.cpp
--- a/src/minerfund.cpp
+++ b/src/minerfund.cpp
@@ -6,6 +6,7 @@
 
 #include <chainparams.h>
 #include <consensus/activation.h>
+#include <currencyunit.h>
 #include <key_io.h> // For DecodeDestination
 #include <util/system.h>
 #include <validation.h> // For VersionBitsBlockState
@@ -30,8 +31,8 @@
     static const std::string bitcoinCashMinerFund =
         "bitcoincash:pqnqv9lt7e5vjyp0w88zf2af0l92l8rxdgnlxww9j9";
     static CTxDestination dest = BuildDestination(
-        gArgs.GetBoolArg("-ecash", false) ? ecashMinerFund
-                                          : bitcoinCashMinerFund);
+        gArgs.GetBoolArg("-ecash", DEFAULT_ECASH) ? ecashMinerFund
+                                                  : bitcoinCashMinerFund);
     return dest;
 }