diff --git a/libs/util/include/psemek/util/span.hpp b/libs/util/include/psemek/util/span.hpp
index 9ee1f8e0..b476c9b1 100644
--- a/libs/util/include/psemek/util/span.hpp
+++ b/libs/util/include/psemek/util/span.hpp
@@ -47,7 +47,7 @@ namespace psemek::util
 		{}
 
 		template <typename Container>
-		span(Container & a)
+		span(Container && a)
 			: p_begin{a.data()}
 			, p_end{a.data() + a.size()}
 		{}