1 files changed, 7 insertions, 9 deletions
diff --git a/src/univalue/lib/univalue.cpp b/src/univalue/lib/univalue.cpp
index d8ad7c4b90..4c9c15d63e 100644
--- a/src/univalue/lib/univalue.cpp
+++ b/src/univalue/lib/univalue.cpp
@@ -10,8 +10,6 @@
 
 #include "univalue.h"
 
-using namespace std;
-
 const UniValue NullUniValue;
 
 void UniValue::clear()
@@ -37,15 +35,15 @@ bool UniValue::setBool(bool val_)
     return true;
 }
 
-static bool validNumStr(const string& s)
+static bool validNumStr(const std::string& s)
 {
-    string tokenVal;
+    std::string tokenVal;
     unsigned int consumed;
     enum jtokentype tt = getJsonToken(tokenVal, consumed, s.data(), s.data() + s.size());
     return (tt == JTOK_NUMBER);
 }
 
-bool UniValue::setNumStr(const string& val_)
+bool UniValue::setNumStr(const std::string& val_)
 {
     if (!validNumStr(val_))
         return false;
@@ -58,7 +56,7 @@ bool UniValue::setNumStr(const string& val_)
 
 bool UniValue::setInt(uint64_t val_)
 {
-    ostringstream oss;
+    std::ostringstream oss;
 
     oss << val_;
 
@@ -67,7 +65,7 @@ bool UniValue::setInt(uint64_t val_)
 
 bool UniValue::setInt(int64_t val_)
 {
-    ostringstream oss;
+    std::ostringstream oss;
 
     oss << val_;
 
@@ -76,7 +74,7 @@ bool UniValue::setInt(int64_t val_)
 
 bool UniValue::setFloat(double val_)
 {
-    ostringstream oss;
+    std::ostringstream oss;
 
     oss << std::setprecision(16) << val_;
 
@@ -85,7 +83,7 @@ bool UniValue::setFloat(double val_)
     return ret;
 }
 
-bool UniValue::setStr(const string& val_)
+bool UniValue::setStr(const std::string& val_)
 {
     clear();
     typ = VSTR;