Test for inequality instead.

diff --git a/source/grid/grid_in.cc b/source/grid/grid_in.cc
index c8598cce4176bfc7ece8b9cab029a279da226197..fb94862a0e35ae022289adc8c46175f8e65abbaf 100644 (file)
--- a/source/grid/grid_in.cc
+++ b/source/grid/grid_in.cc
@@ -2077,7 +2077,7 @@ void GridIn<3>::read_netcdf (const std::string &filename)
   // as it denotes an internal face
   for (unsigned int i=0; i<bmarker.size(); ++i)
     Assert(0<=bmarker[i] &&
-           static_cast<types::boundary_id>(bmarker[i])<numbers::internal_face_boundary_id,
+           static_cast<types::boundary_id>(bmarker[i])!=numbers::internal_face_boundary_id,
            ExcIO());
 
   // finally we setup the boundary