diff --git a/opm/simulators/wells/WellGroupHelpers.cpp b/opm/simulators/wells/WellGroupHelpers.cpp
index 32c2017a1..edaeb07e6 100644
--- a/opm/simulators/wells/WellGroupHelpers.cpp
+++ b/opm/simulators/wells/WellGroupHelpers.cpp
@@ -18,6 +18,7 @@
   along with OPM.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include <config.h>
 #include <opm/simulators/wells/WellGroupHelpers.hpp>
 #include <opm/simulators/wells/TargetCalculator.hpp>