diff --git a/src/base58.cpp b/src/base58.cpp
index c9e91beef..76f0404a1 100644
--- a/src/base58.cpp
+++ b/src/base58.cpp
@@ -215,9 +215,13 @@ bool CBitcoinAddress::Set(const CTxDestination &dest) {
 }
 
 bool CBitcoinAddress::IsValid() const {
+    return IsValid(Params());
+}
+
+bool CBitcoinAddress::IsValid(const CChainParams &params) const {
     bool fCorrectSize = vchData.size() == 20;
-    bool fKnownVersion = vchVersion == Params().Base58Prefix(CChainParams::PUBKEY_ADDRESS) ||
-                         vchVersion == Params().Base58Prefix(CChainParams::SCRIPT_ADDRESS);
+    bool fKnownVersion = vchVersion == params.Base58Prefix(CChainParams::PUBKEY_ADDRESS) ||
+                         vchVersion == params.Base58Prefix(CChainParams::SCRIPT_ADDRESS);
     return fCorrectSize && fKnownVersion;
 }
 
diff --git a/src/base58.h b/src/base58.h
index 216aca364..15bf710f5 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -104,6 +104,7 @@ public:
     bool Set(const CScriptID &id);
     bool Set(const CTxDestination &dest);
     bool IsValid() const;
+    bool IsValid(const CChainParams &params) const;
 
     CBitcoinAddress() {}
     CBitcoinAddress(const CTxDestination &dest) { Set(dest); }
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 460fabc6e..179db5a81 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -221,24 +221,25 @@ const CChainParams &Params() {
     return *pCurrentParams;
 }
 
-void SelectParams(CBaseChainParams::Network network) {
-    SelectBaseParams(network);
+CChainParams &Params(CBaseChainParams::Network network) {
     switch (network) {
         case CBaseChainParams::MAIN:
-            pCurrentParams = &mainParams;
-            break;
+            return mainParams;
         case CBaseChainParams::TESTNET:
-            pCurrentParams = &testNetParams;
-            break;
+            return testNetParams;
         case CBaseChainParams::REGTEST:
-            pCurrentParams = &regTestParams;
-            break;
+            return regTestParams;
         default:
             assert(false && "Unimplemented network");
-            return;
+            return mainParams;
     }
 }
 
+void SelectParams(CBaseChainParams::Network network) {
+    SelectBaseParams(network);
+    pCurrentParams = &Params(network);
+}
+
 bool SelectParamsFromCommandLine() {
     if (!SelectBaseParamsFromCommandLine())
         return false;
diff --git a/src/chainparams.h b/src/chainparams.h
index 95b972bd7..e5dfc87c6 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -111,6 +111,9 @@ protected:
  */
 const CChainParams &Params();
 
+/** Return parameters for the given network. */
+CChainParams &Params(CBaseChainParams::Network network);
+
 /** Sets the params returned by Params() to those for the given network. */
 void SelectParams(CBaseChainParams::Network network);
 
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index f6a4b599d..219a685fa 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -10,6 +10,7 @@
 #include "optionsmodel.h"
 
 #include "base58.h"
+#include "chainparams.h"
 #include "ui_interface.h"
 #include "util.h"
 #include "wallet.h"
@@ -200,8 +201,11 @@ bool PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             {
                 CBitcoinAddress address(r.address.toStdString());
 
-                SelectParams(CBaseChainParams::MAIN);
-                if (!address.IsValid())
+                if (address.IsValid(Params(CBaseChainParams::MAIN)))
+                {
+                    SelectParams(CBaseChainParams::MAIN);
+                }
+                else if (address.IsValid(Params(CBaseChainParams::TESTNET)))
                 {
                     SelectParams(CBaseChainParams::TESTNET);
                 }