diff --git a/src/day7.cpp b/src/day7.cpp
index 821668f..84b4e7d 100644
--- a/src/day7.cpp
+++ b/src/day7.cpp
@@ -79,8 +79,8 @@ uint64_t part_2(const Grid &grid) {
   using namespace std::ranges;
   auto view = iota_view{start_row, grid.size()};
   std::map<size_t, uint64_t> starting_cols{{start_col, 1}};
-  auto cols = fold_left(view, starting_cols, [&grid](auto acc, auto row) {
-    return fold_left(acc, std::map<size_t, uint64_t>{},
+  auto cols = fold_left(view, starting_cols, [&grid](auto cols, auto row) {
+    return fold_left(cols, std::map<size_t, uint64_t>{},
                      [&grid, &row](auto next_cols, auto col_cnt) {
                        auto [col, cnt] = col_cnt;
                        if (at_loc(grid, row, col) == '^') {