diff --git a/maths.hpp b/maths.hpp
index c4f31c7f..a145027e 100644
--- a/maths.hpp
+++ b/maths.hpp
@@ -544,6 +544,13 @@ namespace cruft {
         return sum;
     }
 
+    template <concepts::named::container ContainerT>
+    typename ContainerT::value_type
+    sum (ContainerT const &src)
+    {
+        return sum (src.begin (), src.end ());
+    }
+
 
     //-------------------------------------------------------------------------
     template <typename InputT>