diff --git a/examples/spu_2p.cpp b/examples/spu_2p.cpp
index e80462bc..04929fa0 100644
--- a/examples/spu_2p.cpp
+++ b/examples/spu_2p.cpp
@@ -32,6 +32,7 @@
   You should have received a copy of the GNU General Public License
   along with OPM.  If not, see <http://www.gnu.org/licenses/>.
 */
+#include "config.h"
 
 #include <cassert>
 #include <cstddef>