diff --git a/libs/util/include/psemek/util/span.hpp b/libs/util/include/psemek/util/span.hpp
index 42896ea1..aeb1d62d 100644
--- a/libs/util/include/psemek/util/span.hpp
+++ b/libs/util/include/psemek/util/span.hpp
@@ -67,6 +67,8 @@ namespace psemek::util
 
 		difference_type size() const { return p_end - p_begin; }
 
+		bool empty() const { return p_begin == p_end; }
+
 		reverse_iterator rbegin() const { return reverse_iterator(p_end); }
 		reverse_iterator rend() const { return reverse_iterator(p_begin); }