diff --git a/src/ox/std/string.cpp b/src/ox/std/string.cpp
index 812776718..18d1b9bbe 100644
--- a/src/ox/std/string.cpp
+++ b/src/ox/std/string.cpp
@@ -70,6 +70,11 @@ const String &String::operator=(const String &src) noexcept {
 	return *this = src.c_str();
 }
 
+const String &String::operator=(const String &&src) noexcept {
+	m_buff = ox::move(src.m_buff);
+	return *this;
+}
+
 const String &String::operator+=(const char *str) noexcept {
 	std::size_t strLen = ox_strlen(str);
 	auto currentLen = len();
diff --git a/src/ox/std/string.hpp b/src/ox/std/string.hpp
index b0d932fa8..67b468e5f 100644
--- a/src/ox/std/string.hpp
+++ b/src/ox/std/string.hpp
@@ -41,6 +41,8 @@ class String {
 
 		const String &operator=(const String &src) noexcept;
 
+		const String &operator=(const String &&src) noexcept;
+
 		const String &operator+=(const char *str) noexcept;
 
 		const String &operator+=(char *str) noexcept;