diff --git a/src/rpcclient.cpp b/src/rpcclient.cpp
index c07aff367..df21d31fa 100644
--- a/src/rpcclient.cpp
+++ b/src/rpcclient.cpp
@@ -150,6 +150,7 @@ Array RPCConvertValues(const std::string &strMethod, const std::vector<std::stri
     if (strMethod == "listtransactions"       && n > 2) ConvertTo<int64_t>(params[2]);
     if (strMethod == "listaccounts"           && n > 0) ConvertTo<int64_t>(params[0]);
     if (strMethod == "walletpassphrase"       && n > 1) ConvertTo<int64_t>(params[1]);
+    if (strMethod == "walletpassphrase"       && n > 2) ConvertTo<bool>(params[2]);
     if (strMethod == "getblocktemplate"       && n > 0) ConvertTo<Object>(params[0]);
     if (strMethod == "listsinceblock"         && n > 1) ConvertTo<int64_t>(params[1]);
     if (strMethod == "sendmany"               && n > 1) ConvertTo<Object>(params[1]);
diff --git a/src/rpcwallet.cpp b/src/rpcwallet.cpp
index 7879f94d7..e1c4c245d 100644
--- a/src/rpcwallet.cpp
+++ b/src/rpcwallet.cpp
@@ -1563,23 +1563,25 @@ Value walletpassphrase(const Array& params, bool fHelp)
 {
     if (pwalletMain->IsCrypted() && (fHelp || params.size() < 2 || params.size() > 3))
         throw runtime_error(
-            "walletpassphrase \"passphrase\" <timeout> <anonymizeOnly>\n"
+            "walletpassphrase \"passphrase\" timeout ( anonymizeonly )>\n"
             "\nStores the wallet decryption key in memory for 'timeout' seconds.\n"
             "This is needed prior to performing transactions related to private keys such as sending darkcoins\n"
             "\nArguments:\n"
             "1. \"passphrase\"     (string, required) The wallet passphrase\n"
             "2. timeout            (numeric, required) The time to keep the decryption key in seconds.\n"
+            "3. anonymizeonly      (boolean, optional, default=flase) If is true sending functions are disabled."
             "\nNote:\n"
             "Issuing the walletpassphrase command while the wallet is already unlocked will set a new unlock\n"
             "time that overrides the old one.\n"
             "\nExamples:\n"
-            "\nunlock the wallet for 60 seconds\n"
+            "\nUlock the wallet for 60 seconds\n"
             + HelpExampleCli("walletpassphrase", "\"my pass phrase\" 60") +
+            "\nUlock the wallet for 60 seconds but allow Darksend mixing only\n"
+            + HelpExampleCli("walletpassphrase", "\"my pass phrase\" 60 true") +
             "\nLock the wallet again (before 60 seconds)\n"
             + HelpExampleCli("walletlock", "") +
             "\nAs json rpc call\n"
-            + HelpExampleRpc("walletpassphrase", "\"my pass phrase\", 60") +
-            "if [anonymizeonly] is true sending functions are disabled."
+            + HelpExampleRpc("walletpassphrase", "\"my pass phrase\", 60")
         );
 
     if (fHelp)
@@ -1594,24 +1596,15 @@ Value walletpassphrase(const Array& params, bool fHelp)
     // Alternately, find a way to make params[0] mlock()'d to begin with.
     strWalletPass = params[0].get_str().c_str();
 
-    if (strWalletPass.length() > 0)
-    {
-        bool anonymizeOnly;
-        if (params.size() == 3)
-            anonymizeOnly = params[2].get_bool();
-        else
-            anonymizeOnly = false;
+    bool anonymizeOnly = false;
+    if (params.size() == 3)
+        anonymizeOnly = params[2].get_bool();
 
-        if (!pwalletMain->IsLocked() && pwalletMain->fWalletUnlockAnonymizeOnly && anonymizeOnly)
-            throw JSONRPCError(RPC_WALLET_ALREADY_UNLOCKED, "Error: Wallet is already unlocked.");
+    if (!pwalletMain->IsLocked() && pwalletMain->fWalletUnlockAnonymizeOnly && anonymizeOnly)
+        throw JSONRPCError(RPC_WALLET_ALREADY_UNLOCKED, "Error: Wallet is already unlocked.");
 
-        if (!pwalletMain->Unlock(strWalletPass, anonymizeOnly))
-            throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
-    }
-    else
-        throw runtime_error(
-            "walletpassphrase <passphrase> <timeout> <anonymizeOnly>\n"
-            "Stores the wallet decryption key in memory for <timeout> seconds.");
+    if (!pwalletMain->Unlock(strWalletPass, anonymizeOnly))
+        throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
 
     pwalletMain->TopUpKeyPool();