if ((ssize_t) visited_pairs.size() > _sg_mc_visited) {
int min2 = mc_stats->expanded_pairs;
unsigned int index2 = 0;
- for (std::size_t i = 0; i != visited_pairs.size(); ++i) {
+ for (std::size_t i = 0; i != (std::size_t) visited_pairs.size(); ++i) {
simgrid::mc::VisitedPair* pair_test = visited_pairs[i];
if (!mc_model_checker->is_important_snapshot(*pair_test->graph_state->system_state)
&& pair_test->num < min2) {