diff --git a/src/bench/base58.cpp b/src/bench/base58.cpp
index 78e008212..7b64b8b6b 100644
--- a/src/bench/base58.cpp
+++ b/src/bench/base58.cpp
@@ -1,45 +1,44 @@
 // Copyright (c) 2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include "bench.h"
 
 #include "base58.h"
 #include "validation.h"
 
+#include <array>
 #include <string>
 #include <vector>
 
 static void Base58Encode(benchmark::State &state) {
-    uint8_t buff[32] = {17,  79,  8,   99,  150, 189, 208, 162, 22,  23, 203,
-                        163, 36,  58,  147, 227, 139, 2,   215, 100, 91, 38,
-                        11,  141, 253, 40,  117, 21,  16,  90,  200, 24};
-    uint8_t *b = buff;
+    static const std::vector<uint8_t> buffer = {
+        17,  79,  8,   99,  150, 189, 208, 162, 22,  23, 203,
+        163, 36,  58,  147, 227, 139, 2,   215, 100, 91, 38,
+        11,  141, 253, 40,  117, 21,  16,  90,  200, 24};
     while (state.KeepRunning()) {
-        EncodeBase58(b, b + 32);
+        EncodeBase58(buffer);
     }
 }
 
 static void Base58CheckEncode(benchmark::State &state) {
-    uint8_t buff[32] = {17,  79,  8,   99,  150, 189, 208, 162, 22,  23, 203,
-                        163, 36,  58,  147, 227, 139, 2,   215, 100, 91, 38,
-                        11,  141, 253, 40,  117, 21,  16,  90,  200, 24};
-    uint8_t *b = buff;
-    std::vector<uint8_t> vch;
-    vch.assign(b, b + 32);
+    static const std::vector<uint8_t> buffer = {
+        17,  79,  8,   99,  150, 189, 208, 162, 22,  23, 203,
+        163, 36,  58,  147, 227, 139, 2,   215, 100, 91, 38,
+        11,  141, 253, 40,  117, 21,  16,  90,  200, 24};
     while (state.KeepRunning()) {
-        EncodeBase58Check(vch);
+        EncodeBase58Check(buffer);
     }
 }
 
 static void Base58Decode(benchmark::State &state) {
     const char *addr = "17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem";
     std::vector<uint8_t> vch;
     while (state.KeepRunning()) {
         DecodeBase58(addr, vch);
     }
 }
 
 BENCHMARK(Base58Encode);
 BENCHMARK(Base58CheckEncode);
 BENCHMARK(Base58Decode);