diff --git a/dune/gfe/unitvector.hh b/dune/gfe/unitvector.hh
index 51a6351e93ba6df8946d6a1a5a85024c3284f181..a1145af47f0c2f1990cd7031e6bbaedeeb8ac1cc 100644
--- a/dune/gfe/unitvector.hh
+++ b/dune/gfe/unitvector.hh
@@ -3,6 +3,7 @@
 
 #include <dune/common/fvector.hh>
 #include <dune/common/fmatrix.hh>
+#include <dune/common/power.hh>
 
 #include <dune/gfe/tensor3.hh>
 #include <dune/gfe/symmetricmatrix.hh>