1 files changed, 8 insertions, 5 deletions

diff --git a/python/nissy_module.c b/python/nissy_module.c
index 46570dc..b389297 100644
--- a/python/nissy_module.c
+++ b/python/nissy_module.c
@@ -263,7 +263,8 @@ gendata(PyObject *self, PyObject *args)
 {
         long long size, err;
         const char *solver;
-        char *buf, dataid[NISSY_SIZE_DATAID];
+        char dataid[NISSY_SIZE_DATAID];
+        unsigned char *buf;
 
         if (!PyArg_ParseTuple(args, "s", &solver))
                 return NULL;
@@ -279,7 +280,7 @@ gendata(PyObject *self, PyObject *args)
         Py_END_ALLOW_THREADS
 
         if (check_error(err))
-                return PyByteArray_FromStringAndSize(buf, size);
+                return PyByteArray_FromStringAndSize((char *)buf, size);
         else
                 return NULL;
 }
@@ -303,7 +304,8 @@ checkdata(PyObject *self, PyObject *args)
         if (!PyArg_ParseTuple(args, "Y", &data))
                 return NULL;
 
-        result = nissy_checkdata(data->ob_alloc, data->ob_bytes);
+        result = nissy_checkdata(
+            data->ob_alloc, (unsigned char *)data->ob_bytes);
 
         if (check_error(result))
                 return Py_True;
@@ -348,8 +350,9 @@ solve(PyObject *self, PyObject *args)
 
         Py_BEGIN_ALLOW_THREADS
         result = nissy_solve(cube, solver, nissflag, minmoves, maxmoves,
-            maxsolutions, optimal, threads, data->ob_alloc, data->ob_bytes,
-            MAX_SOLUTIONS_SIZE, solutions, stats);
+            maxsolutions, optimal, threads, data->ob_alloc,
+            (unsigned char *)data->ob_bytes, MAX_SOLUTIONS_SIZE, solutions,
+            stats);
         Py_END_ALLOW_THREADS
 
         if(!check_error(result)) {