diff --git a/src/bench/crypto_hash.cpp b/src/bench/crypto_hash.cpp
index 65da942ad7c3b..a0799aea7adf2 100644
--- a/src/bench/crypto_hash.cpp
+++ b/src/bench/crypto_hash.cpp
@@ -192,10 +192,16 @@ static void SHA512(benchmark::Bench& bench)
 
 static void SipHash_32b(benchmark::Bench& bench)
 {
-    uint256 x;
-    uint64_t k1 = 0;
+    FastRandomContext rng{/*fDeterministic=*/true};
+    auto k0{rng.rand64()}, k1{rng.rand64()};
+    auto val{rng.rand256()};
+    auto i{0U};
     bench.run([&] {
-        *((uint64_t*)x.begin()) = SipHashUint256(0, ++k1, x);
+        ankerl::nanobench::doNotOptimizeAway(SipHashUint256(k0, k1, val));
+        ++k0;
+        ++k1;
+        ++i;
+        val.data()[i % uint256::size()] ^= i & 0xFF;
     });
 }