1 files changed, 5 insertions, 0 deletions

diff --git a/src/solvers/tables.h b/src/solvers/tables.h
index 3db1d1e..f850793 100644
--- a/src/solvers/tables.h
+++ b/src/solvers/tables.h
@@ -1,3 +1,6 @@
+#ifndef SOLVERS_TABLES_H
+#define SOLVERS_TABLES_H
+
 STATIC uint64_t read_unaligned_u64(
     const unsigned char [SIZE(sizeof(uint64_t))]);
 STATIC void write_unaligned_u64(
@@ -147,3 +150,5 @@ append_name(tableinfo_t info[NON_NULL], const char *str)
 
         info->solver[j] = '\0';
 }
+
+#endif /* SOLVERS_TABLES_H */