diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index f2a14b829..dfb4c59d8 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -354,10 +354,13 @@ void SelectParams(CBaseChainParams::Network network) {
     pCurrentParams = &Params(network);
 }
 
-bool SelectParamsFromCommandLine() {
-    if (!SelectBaseParamsFromCommandLine())
+bool SelectParamsFromCommandLine()
+{
+    CBaseChainParams::Network network = NetworkIdFromCommandLine();
+    if (network == CBaseChainParams::MAX_NETWORK_TYPES)
         return false;
 
-    SelectParams(BaseParams().NetworkID());
+    SelectBaseParams(network);
+    SelectParams(network);
     return true;
 }
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
index e9d63197b..5d9ec7927 100644
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -100,22 +100,27 @@ void SelectBaseParams(CBaseChainParams::Network network)
     }
 }
 
-bool SelectBaseParamsFromCommandLine()
+CBaseChainParams::Network NetworkIdFromCommandLine()
 {
     bool fRegTest = GetBoolArg("-regtest", false);
     bool fTestNet = GetBoolArg("-testnet", false);
 
-    if (fTestNet && fRegTest) {
-        return false;
-    }
+    if (fTestNet && fRegTest)
+        return CBaseChainParams::MAX_NETWORK_TYPES;
+    if (fRegTest)
+        return CBaseChainParams::REGTEST;
+    if (fTestNet)
+        return CBaseChainParams::TESTNET;
+    return CBaseChainParams::MAIN;
+}
 
-    if (fRegTest) {
-        SelectBaseParams(CBaseChainParams::REGTEST);
-    } else if (fTestNet) {
-        SelectBaseParams(CBaseChainParams::TESTNET);
-    } else {
-        SelectBaseParams(CBaseChainParams::MAIN);
-    }
+bool SelectBaseParamsFromCommandLine()
+{
+    CBaseChainParams::Network network = NetworkIdFromCommandLine();
+    if (network == CBaseChainParams::MAX_NETWORK_TYPES)
+        return false;
+
+    SelectBaseParams(network);
     return true;
 }
 
diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
index cc154cf50..911d1181a 100644
--- a/src/chainparamsbase.h
+++ b/src/chainparamsbase.h
@@ -26,7 +26,6 @@ public:
 
     const std::string& DataDir() const { return strDataDir; }
     int RPCPort() const { return nRPCPort; }
-    Network NetworkID() const { return networkID; }
 
 protected:
     CBaseChainParams() {}
@@ -46,7 +45,13 @@ const CBaseChainParams& BaseParams();
 void SelectBaseParams(CBaseChainParams::Network network);
 
 /**
- * Looks for -regtest or -testnet and then calls SelectParams as appropriate.
+ * Looks for -regtest or -testnet and returns the appropriate Network ID.
+ * Returns MAX_NETWORK_TYPES if an invalid combination is given.
+ */
+CBaseChainParams::Network NetworkIdFromCommandLine();
+
+/**
+ * Calls NetworkIdFromCommandLine() and then calls SelectParams as appropriate.
  * Returns false if an invalid combination is given.
  */
 bool SelectBaseParamsFromCommandLine();
diff --git a/src/util.cpp b/src/util.cpp
index 632d0965b..544ffc98b 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -395,7 +395,8 @@ boost::filesystem::path GetDefaultDataDir()
 #endif
 }
 
-static boost::filesystem::path pathCached[CBaseChainParams::MAX_NETWORK_TYPES+1];
+static boost::filesystem::path pathCached;
+static boost::filesystem::path pathCachedNetSpecific;
 static CCriticalSection csPathCached;
 
 const boost::filesystem::path &GetDataDir(bool fNetSpecific)
@@ -404,10 +405,7 @@ const boost::filesystem::path &GetDataDir(bool fNetSpecific)
 
     LOCK(csPathCached);
 
-    int nNet = CBaseChainParams::MAX_NETWORK_TYPES;
-    if (fNetSpecific) nNet = BaseParams().NetworkID();
-
-    fs::path &path = pathCached[nNet];
+    fs::path &path = fNetSpecific ? pathCachedNetSpecific : pathCached;
 
     // This can be called during exceptions by LogPrintf(), so we cache the
     // value so we don't have to do memory allocations after that.
@@ -433,8 +431,8 @@ const boost::filesystem::path &GetDataDir(bool fNetSpecific)
 
 void ClearDatadirCache()
 {
-    std::fill(&pathCached[0], &pathCached[CBaseChainParams::MAX_NETWORK_TYPES+1],
-        boost::filesystem::path());
+    pathCached = boost::filesystem::path();
+    pathCachedNetSpecific = boost::filesystem::path();
 }
 
 boost::filesystem::path GetConfigFile()