diff --git a/lib/base/string.hpp b/lib/base/string.hpp
index 2ed06b86d..f86b29246 100644
--- a/lib/base/string.hpp
+++ b/lib/base/string.hpp
@@ -77,6 +77,10 @@ public:
 		: m_Data(other.m_Data)
 	{ }
 
+	inline String(String&& other)
+		: m_Data(other)
+	{ }
+
 	inline ~String(void)
 	{ }
 
diff --git a/lib/base/value.hpp b/lib/base/value.hpp
index 3d12a262e..52a03b195 100644
--- a/lib/base/value.hpp
+++ b/lib/base/value.hpp
@@ -99,6 +99,10 @@ public:
 		: m_Value(other.m_Value)
 	{ }
 
+	inline Value(Value&& other)
+		: m_Value(other.m_Value)
+	{ }
+
 	inline Value(Object *value)
 	{
 		if (!value)