diff --git a/opm/output/data/Cells.hpp b/opm/output/data/Cells.hpp
index 30059d7e4..bd7454a9f 100644
--- a/opm/output/data/Cells.hpp
+++ b/opm/output/data/Cells.hpp
@@ -15,51 +15,44 @@
You should have received a copy of the GNU General Public License
along with OPM. If not, see .
- */
+*/
#ifndef OPM_OUTPUT_CELLS_HPP
#define OPM_OUTPUT_CELLS_HPP
-#include