diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index 6e26794..590bb2a 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -32,11 +32,7 @@ static int       stackDepth_g = 0;  // see readValue()
 
 namespace Json {
 
-#if __cplusplus >= 201103L
-typedef std::unique_ptr<CharReader> CharReaderPtr;
-#else
 typedef std::auto_ptr<CharReader>   CharReaderPtr;
-#endif
 
 // Implementation of class Features
 // ////////////////////////////////
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index 5510eb1..6ec3820 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -40,11 +40,7 @@
 
 namespace Json {
 
-#if __cplusplus >= 201103L
-typedef std::unique_ptr<StreamWriter> StreamWriterPtr;
-#else
 typedef std::auto_ptr<StreamWriter>   StreamWriterPtr;
-#endif
 
 static bool containsControlCharacter(const char* str) {
   while (*str) {