diff --git a/src/utility/wide_string.cpp b/src/utility/wide_string.cpp
index 4453ec5b..a9595e48 100644
--- a/src/utility/wide_string.cpp
+++ b/src/utility/wide_string.cpp
@@ -24,12 +24,12 @@
 
 std::string ToString(std::wstring ws)
 {
-	return boost::locale::conv::utf_to_utf<char>(ws);
+	return boost::locale::conv::utf_to_utf<char>(std::move(ws));
 }
 
 std::wstring ToWString(std::string s)
 {
-	return boost::locale::conv::utf_to_utf<wchar_t>(s);
+	return boost::locale::conv::utf_to_utf<wchar_t>(std::move(s));
 }
 
 size_t wideLength(const std::wstring &ws)