diff --git a/src/Variant.cpp b/src/Variant.cpp
index d0afa4234..b755d7d04 100644
--- a/src/Variant.cpp
+++ b/src/Variant.cpp
@@ -27,6 +27,7 @@
 #include <cmake.h>
 #include <sstream>
 #include <algorithm>
+#include <utility>
 #include <stdio.h>
 #include <math.h>
 #include <stdlib.h>
@@ -127,9 +128,9 @@ Variant::Variant (const double value)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-Variant::Variant (const std::string& value)
+Variant::Variant (std::string  value)
 : _type (Variant::type_string)
-, _string (value)
+, _string (std::move(value))
 {
 }
 
diff --git a/src/Variant.h b/src/Variant.h
index 05f1f575b..748830da8 100644
--- a/src/Variant.h
+++ b/src/Variant.h
@@ -47,7 +47,7 @@ public:
   Variant (const bool);
   Variant (const int);
   Variant (const double);
-  Variant (const std::string&);
+  Variant (std::string );
   Variant (const char*);
   Variant (const time_t, const enum type);