diff --git a/ecal/core/src/logging/ecal_file_resource.cpp b/ecal/core/src/logging/ecal_file_resource.cpp
index eba72a6cff..3f969ba849 100644
--- a/ecal/core/src/logging/ecal_file_resource.cpp
+++ b/ecal/core/src/logging/ecal_file_resource.cpp
@@ -20,67 +20,57 @@
 #include "ecal_file_resource.h"
 
 #include <cstdarg>
-#include <sstream>
-#include <vector>
 
 namespace eCAL
 {
   namespace Logging
   {
-    bool FileResource::fopen(const std::string& filename, std::ios::openmode mode)
+    void FileDeleter::operator()(FILE* file) const 
     {
-      m_file.open(filename, mode);
-
-      return m_file.is_open();
+      if (file) {
+        fclose(file);
+      }
     }
 
-    void FileResource::fprintf(const char* format, ...) 
+    FileResource::FileResource() : m_file(nullptr)
     {
-      if (!m_file.is_open())
-      {
-        return;
-      } 
-
-      va_list args;
-      va_start(args, format);
+    }
 
-      // Determine the size of the formatted string
-      va_list args_copy;
-      va_copy(args_copy, args);
-      int size = vsnprintf(nullptr, 0, format, args_copy);
-      va_end(args_copy);
+    bool FileResource::fopen(const char* filename, const char* mode)
+    {
+      m_file.reset(std::fopen(filename, mode));
 
-      if (size < 0)
+      if (m_file == nullptr)
       {
-        va_end(args);
-        return;
+        return false;
       }
+      else
+      {
+        return true;
+      }
+    }
 
-      // Create a buffer and format the string into it
-      std::vector<char> buffer(size + 1);
-      vsnprintf(buffer.data(), buffer.size(), format, args);
+    void FileResource::fprintf(const char* format, ...) 
+    {
+      va_list args;
+      va_start(args, format);
+      vfprintf(m_file.get(), format, args);
       va_end(args);
-
-      // Write the formatted string to the file
-      m_file << buffer.data();
     }
 
     void FileResource::fflush() 
     {
-      if (m_file.is_open())
-      {
-        m_file.flush();
-      }
+      std::fflush(m_file.get());
     }
 
     void FileResource::fclose() 
     {
-      m_file.close();
+      m_file.reset();
     }
 
     bool FileResource::isOpen() const
     {
-      return m_file.is_open();
+      return m_file != nullptr;
     }
   }
 }
diff --git a/ecal/core/src/logging/ecal_file_resource.h b/ecal/core/src/logging/ecal_file_resource.h
index 645b6502fd..c41dddd54d 100644
--- a/ecal/core/src/logging/ecal_file_resource.h
+++ b/ecal/core/src/logging/ecal_file_resource.h
@@ -24,18 +24,22 @@
 #pragma once
 
 #include <cstdio>
-#include <fstream>
-#include <string>
+#include <memory>
 
 namespace eCAL
 {
   namespace Logging
   {
+    // Custom deleter for FILE*
+    struct FileDeleter {
+        void operator()(FILE* file) const;
+    };
+
     class FileResource {
     public:
-        FileResource() = default;
+        FileResource();
         
-        bool fopen(const std::string& filename, std::ios::openmode mode);
+        bool fopen(const char* filename, const char* mode);
         bool isOpen() const;
         void fclose();
 
@@ -43,7 +47,7 @@ namespace eCAL
         void fflush();
 
     private:
-        std::fstream m_file;
+        std::unique_ptr<FILE, FileDeleter> m_file;
     };
   }
 }
\ No newline at end of file
diff --git a/ecal/core/src/logging/ecal_log_impl.cpp b/ecal/core/src/logging/ecal_log_impl.cpp
index bdfc746a1d..120aae060f 100644
--- a/ecal/core/src/logging/ecal_log_impl.cpp
+++ b/ecal/core/src/logging/ecal_log_impl.cpp
@@ -168,7 +168,7 @@ namespace eCAL
         const std::string tstring = get_time_str();
       
         m_logfile_name = m_attributes.file.path + tstring + "_" + m_attributes.unit_name + "_" + std::to_string(m_attributes.process_id) + ".log";
-        file_opened = m_logfile.fopen(m_logfile_name.c_str(), std::ios::out);
+        file_opened = m_logfile.fopen(m_logfile_name.c_str(), "w");
       }
       else
       {