diff --git a/drama/src/rev-mc.c b/drama/src/rev-mc.c
index c5bba1f..f3bf53d 100644
--- a/drama/src/rev-mc.c
+++ b/drama/src/rev-mc.c
@@ -320,7 +320,6 @@ find_row_mask(std::vector<set_t> &sets,
 
     std::atomic_bool found{false};
     std::mutex lock;
-    const uint64_t step = 10000;
 
     // while (row_mask < last_mask) {
     //     row_mask = next_bit_permutation(row_mask);
@@ -329,6 +328,8 @@ find_row_mask(std::vector<set_t> &sets,
     std::vector<std::thread> workers;
     auto thread_num = std::thread::hardware_concurrency();
     if (thread_num > 2) { thread_num -= 2; }
+    const uint64_t step = (last_mask - row_mask) / thread_num;
+
     for (int i = 0; i < thread_num; ++i) {
         workers.emplace_back([&] {
             while (!found) {