Index: uspace/lib/cpp/include/internal/thread.hpp
===================================================================
--- uspace/lib/cpp/include/internal/thread.hpp	(revision 69e58387993ec4189bbb06a018a6b2b29e1d9633)
+++ uspace/lib/cpp/include/internal/thread.hpp	(revision 55aa9515e229cd4c6adefa90381f7048e812ec69)
@@ -149,5 +149,5 @@
         {
             template<class Rep, class Period>
-            static time_unit convert(std::chrono::duration<Rep, Period> dur)
+            static time_unit convert(const std::chrono::duration<Rep, Period>& dur)
             {
                 return std::chrono::duration_cast<std::chrono::duration<Rep, micro>>(dur).count();