1 files changed, 5 insertions, 0 deletions

diff --git a/src/solvers/h48/gendata_cocsep.h b/src/solvers/h48/gendata_cocsep.h
index f83207b..1cea52e 100644
--- a/src/solvers/h48/gendata_cocsep.h
+++ b/src/solvers/h48/gendata_cocsep.h
@@ -1,3 +1,6 @@
+#ifndef SOLVERS_H48_GENDATA_COCSEP_H
+#define SOLVERS_H48_GENDATA_COCSEP_H
+
 STATIC size_t gendata_cocsep(unsigned char *, uint64_t *, cube_t *);
 STATIC uint32_t gendata_cocsep_dfs(cocsep_dfs_arg_t [NON_NULL]);
 
@@ -164,3 +167,5 @@ get_h48_cdata(
 
         return CBOUND(*cdata);
 }
+
+#endif /* SOLVERS_H48_GENDATA_COCSEP_H */