Add missing include file.

git-svn-id: https://svn.dealii.org/trunk@24008 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/include/deal.II/base/tensor.h b/deal.II/include/deal.II/base/tensor.h
index 96130fb72946a8f047ad99cfec80c4195dad764f..ee1a176bc3d40dfa82a1db2c5d12a15f895754df 100644 (file)
--- a/deal.II/include/deal.II/base/tensor.h
+++ b/deal.II/include/deal.II/base/tensor.h
@@ -15,6 +15,7 @@
 
 #include <deal.II/base/config.h>
 #include <deal.II/base/tensor_base.h>
+#include <deal.II/base/utilities.h>
 
 DEAL_II_NAMESPACE_OPEN
 template <int rank_, int dim, typename Number> class Tensor;