diff -ru a/boost/units/detail/linear_algebra.hpp b/boost/units/detail/linear_algebra.hpp
--- a/boost/units/detail/linear_algebra.hpp	2014-05-22 09:01:34.224737345 -0600
+++ b/boost/units/detail/linear_algebra.hpp	2014-05-22 09:01:38.276698511 -0600
@@ -246,7 +246,7 @@
         typedef typename RowsBegin::item top_row;
         typedef typename determine_extra_equations_skip_zeros_impl<
             top_row::item::Numerator == 0,
-            RowsBegin::item::size::value == 1
+            RowsBegin::size::value == 1
         >::template apply<
             RowsBegin,
             RowsBegin::size::value,