diff --git a/src/net.cpp b/src/net.cpp
index 6849d7926..3908be682 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1363,7 +1363,7 @@ bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOu
             FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
             FindNode(addrConnect.ToStringIPPort()))
             return false;
-    } else if (FindNode(pszDest))
+    } else if (FindNode(std::string(pszDest)))
         return false;
 
     CNode* pnode = ConnectNode(addrConnect, pszDest);
@@ -1385,7 +1385,7 @@ void ThreadMessageHandler()
 {
     boost::mutex condition_mutex;
     boost::unique_lock<boost::mutex> lock(condition_mutex);
-    
+
     SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
     while (true)
     {
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 41cc18d3c..e3cb4e706 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -35,8 +35,6 @@
 #define MSG_NOSIGNAL 0
 #endif
 
-using namespace std;
-
 // Settings
 static proxyType proxyInfo[NET_MAX];
 static proxyType nameProxy;
@@ -597,13 +595,13 @@ bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout, b
 
 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout, bool *outProxyConnectionFailed)
 {
-    string strDest;
+    std::string strDest;
     int port = portDefault;
 
     if (outProxyConnectionFailed)
         *outProxyConnectionFailed = false;
 
-    SplitHostPort(string(pszDest), port, strDest);
+    SplitHostPort(std::string(pszDest), port, strDest);
 
     proxyType nameProxy;
     GetNameProxy(nameProxy);