1 files changed, 2 insertions, 2 deletions

diff --git a/src/solvers/h48/gendata_cocsep.h b/src/solvers/h48/gendata_cocsep.h
index f07b71a..2eac383 100644
--- a/src/solvers/h48/gendata_cocsep.h
+++ b/src/solvers/h48/gendata_cocsep.h
@@ -1,4 +1,4 @@
-STATIC size_t gendata_cocsep(char *, uint64_t *, cube_t *);
+STATIC size_t gendata_cocsep(unsigned char *, uint64_t *, cube_t *);
 STATIC uint32_t gendata_cocsep_dfs(cocsep_dfs_arg_t [static 1]);
 STATIC void getdistribution_cocsep(
     const uint32_t [static COCSEP_TABLESIZE], uint64_t [static 21]);
@@ -13,7 +13,7 @@ STATIC_INLINE int8_t get_h48_cdata(
 
 STATIC size_t
 gendata_cocsep(
-        char *buf,
+        unsigned char *buf,
         uint64_t *selfsim,
         cube_t *rep
 )