1 files changed, 2 insertions, 2 deletions

diff --git a/src/solvers/h48/solve.h b/src/solvers/h48/solve.h
index 3948b15..c6fe8b7 100644
--- a/src/solvers/h48/solve.h
+++ b/src/solvers/h48/solve.h
@@ -8,8 +8,8 @@ typedef struct {
         int64_t maxsolutions;
         uint8_t h;
         uint8_t k;
-        const uint32_t *cocsepdata;
-        const uint8_t *h48data;
+        _Atomic const uint32_t *cocsepdata;
+        _Atomic const uint8_t *h48data;
         char **nextsol;
         uint8_t nissbranch;
         int8_t npremoves;