diff --git a/src/base/io/log/FileLogWriter.cpp b/src/base/io/log/FileLogWriter.cpp
index 921d9337..352dec20 100644
--- a/src/base/io/log/FileLogWriter.cpp
+++ b/src/base/io/log/FileLogWriter.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 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
@@ -37,9 +37,6 @@ static void fsWriteCallback(uv_fs_t *req)
 }
 
 
-static const char *kNewLine = "\n";
-
-
 } // namespace xmrig
 
 
@@ -50,11 +47,24 @@ bool xmrig::FileLogWriter::open(const char *fileName)
         return false;
     }
 
-    uv_fs_t req;
-    m_file = uv_fs_open(uv_default_loop(), &req, Env::expand(fileName), O_CREAT | O_APPEND | O_WRONLY, 0644, nullptr);
+    uv_fs_t req{};
+    const auto path = Env::expand(fileName);
+    m_file          = uv_fs_open(uv_default_loop(), &req, path, O_CREAT | O_WRONLY, 0644, nullptr);
+
+    if (req.result < 0 || !isOpen()) {
+        uv_fs_req_cleanup(&req);
+        m_file = -1;
+
+        return false;
+    }
+
     uv_fs_req_cleanup(&req);
 
-    return isOpen();
+    uv_fs_stat(uv_default_loop(), &req, path, nullptr);
+    m_pos = req.statbuf.st_size;
+    uv_fs_req_cleanup(&req);
+
+    return true;
 }
 
 
@@ -70,7 +80,8 @@ bool xmrig::FileLogWriter::write(const char *data, size_t size)
     auto req = new uv_fs_t;
     req->data = buf.base;
 
-    uv_fs_write(uv_default_loop(), req, m_file, &buf, 1, -1, fsWriteCallback);
+    uv_fs_write(uv_default_loop(), req, m_file, &buf, 1, m_pos, fsWriteCallback);
+    m_pos += size;
 
     return true;
 }
@@ -78,9 +89,9 @@ bool xmrig::FileLogWriter::write(const char *data, size_t size)
 
 bool xmrig::FileLogWriter::writeLine(const char *data, size_t size)
 {
-    uv_buf_t buf[2] = {
+    const uv_buf_t buf[2] = {
         uv_buf_init(new char[size], size),
-        uv_buf_init(const_cast<char *>(kNewLine), 1)
+        uv_buf_init(m_endl, sizeof(m_endl) - 1)
     };
 
     memcpy(buf[0].base, data, size);
@@ -88,7 +99,8 @@ bool xmrig::FileLogWriter::writeLine(const char *data, size_t size)
     auto req = new uv_fs_t;
     req->data = buf[0].base;
 
-    uv_fs_write(uv_default_loop(), req, m_file, buf, 2, -1, fsWriteCallback);
+    uv_fs_write(uv_default_loop(), req, m_file, buf, 2, m_pos, fsWriteCallback);
+    m_pos += (buf[0].len + buf[1].len);
 
     return true;
 }
diff --git a/src/base/io/log/FileLogWriter.h b/src/base/io/log/FileLogWriter.h
index 5dca4c58..548d235c 100644
--- a/src/base/io/log/FileLogWriter.h
+++ b/src/base/io/log/FileLogWriter.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 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
@@ -21,6 +21,7 @@
 
 
 #include <cstddef>
+#include <cstdint>
 
 
 namespace xmrig {
@@ -33,13 +34,21 @@ public:
     FileLogWriter(const char *fileName) { open(fileName); }
 
     inline bool isOpen() const  { return m_file >= 0; }
+    inline int64_t pos() const  { return m_pos; }
 
     bool open(const char *fileName);
     bool write(const char *data, size_t size);
     bool writeLine(const char *data, size_t size);
 
 private:
-    int m_file = -1;
+#   ifdef XMRIG_OS_WIN
+    char m_endl[3]  = "\r\n";
+#   else
+    char m_endl[2]  = "\n";
+#   endif
+
+    int m_file      = -1;
+    int64_t m_pos   = 0;
 };