diff --git a/Bench.cpp b/Bench.cpp
index 8932fa5..544e916 100644
--- a/Bench.cpp
+++ b/Bench.cpp
@@ -82,9 +82,10 @@ void bulkFirstGeq() {
   auto *keys = new (arena) weaselab::VersionedMap::Key[kNumQueries];
   auto *versions = new (arena) int64_t[kNumQueries];
   for (int64_t i = 0; i < kNumQueries; ++i) {
-    int64_t version = i * kNumKeys / kNumQueries;
-    versions[i] = version;
-    const auto bigEndian = __builtin_bswap64(version);
+    int64_t key = i * kNumKeys / kNumQueries;
+    static_assert(kNumKeys >= kNumQueries);
+    versions[i] = kNumKeys - i;
+    const auto bigEndian = __builtin_bswap64(key);
     uint8_t *k = new (arena) uint8_t[sizeof(bigEndian)];
     memcpy(k, &bigEndian, sizeof(bigEndian));
     keys[i].p = k;