diff --git a/src/base/tools/Cvt.cpp b/src/base/tools/Cvt.cpp
index be46bc0c..18d5e627 100644
--- a/src/base/tools/Cvt.cpp
+++ b/src/base/tools/Cvt.cpp
@@ -1,7 +1,7 @@
 /* XMRig
  * Copyright (c) 2013-2020 Frank Denis <j at pureftpd dot org>
- * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2021 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2021 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -34,11 +34,6 @@
 namespace xmrig {
 
 
-#ifndef XMRIG_SODIUM
-static std::random_device randomDevice;
-static std::mt19937 randomEngine(randomDevice());
-
-
 static char *cvt_bin2hex(char *const hex, const size_t hex_maxlen, const unsigned char *const bin, const size_t bin_len)
 {
     size_t       i = 0U;
@@ -69,6 +64,11 @@ static char *cvt_bin2hex(char *const hex, const size_t hex_maxlen, const unsigne
 }
 
 
+#ifndef XMRIG_SODIUM
+static std::random_device randomDevice;
+static std::mt19937 randomEngine(randomDevice());
+
+
 static int cvt_hex2bin(unsigned char *const bin, const size_t bin_maxlen, const char *const hex, const size_t hex_len, const char *const ignore, size_t *const bin_len, const char **const hex_end)
 {
     size_t        bin_pos = 0U;
@@ -275,3 +275,17 @@ xmrig::String xmrig::Cvt::toHex(const uint8_t *in, size_t size)
 
     return buf;
 }
+
+
+void xmrig::Cvt::randomBytes(void *buf, size_t size)
+{
+#   ifndef XMRIG_SODIUM
+    std::uniform_int_distribution<> dis(0, 255);
+
+    for (size_t i = 0; i < size; ++i) {
+        static_cast<uint8_t *>(buf)[i] = static_cast<char>(dis(randomEngine));
+    }
+#   else
+    randombytes_buf(buf, size);
+#   endif
+}
diff --git a/src/base/tools/Cvt.h b/src/base/tools/Cvt.h
index 8b67b146..e7507aaf 100644
--- a/src/base/tools/Cvt.h
+++ b/src/base/tools/Cvt.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2021 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2021 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -52,6 +52,7 @@ public:
     static rapidjson::Value toHex(const std::string &data, rapidjson::Document &doc);
     static rapidjson::Value toHex(const uint8_t *in, size_t size, rapidjson::Document &doc);
     static String toHex(const uint8_t *in, size_t size);
+    static void randomBytes(void *buf, size_t size);
 };