From ba758066968bbe67c1b5df406eb57252965d4a82 Mon Sep 17 00:00:00 2001
From: Oliver Sander <oliver.sander@tu-dresden.de>
Date: Wed, 9 May 2018 06:06:01 +0200
Subject: [PATCH] Include missing header 'matrix.hh'

---
 dune/gfe/tensorssd.hh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dune/gfe/tensorssd.hh b/dune/gfe/tensorssd.hh
index 43680fe5..ac83b94c 100644
--- a/dune/gfe/tensorssd.hh
+++ b/dune/gfe/tensorssd.hh
@@ -8,7 +8,8 @@
 #include <array>
 
 #include <dune/common/fmatrix.hh>
-    
+#include <dune/istl/matrix.hh>
+
 /** \brief A third-rank tensor with two static (SS) and one dynamic (D) dimension
  * 
  * \tparam T Type of the entries
-- 
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