1 files changed, 1 insertions, 1 deletions

diff --git a/cube.h b/cube.h
index 791d167..0a39d12 100644
--- a/cube.h
+++ b/cube.h
@@ -130,7 +130,7 @@ int64_t solve(
                           * maximum length is unlimited.
                           */
         int64_t maxsols, /* The maximum number of solutions. */
-        int64_t optimal, /* All solutions at most "optimal" moves from the
+        int8_t optimal,  /* All solutions at most "optimal" moves from the
                           * shortest solution (respecting minmoves) are found.
                           * If negative, this parameter is ignored.
                           */