1 files changed, 5 insertions, 0 deletions

diff --git a/src/solvers/coord/drfinnoe.h b/src/solvers/coord/drfinnoe.h
index 63f4edf..5ffffc3 100644
--- a/src/solvers/coord/drfinnoe.h
+++ b/src/solvers/coord/drfinnoe.h
@@ -1,3 +1,6 @@
+#ifndef SOLVERS_COORD_DRFINNOE_H
+#define SOLVERS_COORD_DRFINNOE_H
+
 /*
 TODO
 
@@ -96,3 +99,5 @@ is_drfinnoe_solvable(cube_t cube) {
                coord_eo(transform_edges(cube, TRANS_URr)) == 0 &&
                coord_co(cube) == 0;
 }
+
+#endif /* SOLVERS_COORD_DRFINNOE_H */