1 files changed, 9 insertions, 2 deletions
diff --git a/src/solve/main.c b/src/solve/main.c
index 140cfc5..b8b966f 100644
--- a/src/solve/main.c
+++ b/src/solve/main.c
@@ -7,11 +7,18 @@
 
 static void
 solve_on_error(
-  const char * const err
+  const char * const err,
+  void *user_data
 ) {
+  UNUSED(user_data);
   die("Error solving level: %s", err);
 }
 
+static const sok_solve_cbs_t
+SOLVE_CBS = {
+  .on_error = solve_on_error,
+};
+
 int main(int argc, char *argv[]) {
   // init context
   sok_ctx_t ctx;
@@ -30,7 +37,7 @@ int main(int argc, char *argv[]) {
     }
 
     // solve level
-    if (!sok_solve(&ctx, solve_on_error)) {
+    if (!sok_solve(&ctx, &SOLVE_CBS, NULL)) {
       die("Couldn't solve level: %d", (int) level_num);
     }
   }