diff --git a/common/rfb/Logger_file.cxx b/common/rfb/Logger_file.cxx
index eabe420a44..0bb18f84ef 100644
--- a/common/rfb/Logger_file.cxx
+++ b/common/rfb/Logger_file.cxx
@@ -26,8 +26,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <os/Mutex.h>
-
 #include <rfb/Logger_file.h>
 
 using namespace rfb;
@@ -37,19 +35,15 @@ Logger_File::Logger_File(const char* loggerName)
     m_lastLogTime(0)
 {
   m_filename[0] = '\0';
-  mutex = new os::Mutex();
 }
 
 Logger_File::~Logger_File()
 {
   closeFile();
-  delete mutex;
 }
 
 void Logger_File::write(int /*level*/, const char *logname, const char *message)
 {
-  os::AutoMutex a(mutex);
-
   if (!m_file) {
     if (m_filename[0] == '\0')
       return;
diff --git a/common/rfb/Logger_file.h b/common/rfb/Logger_file.h
index 6f2a4ef653..f736d43b49 100644
--- a/common/rfb/Logger_file.h
+++ b/common/rfb/Logger_file.h
@@ -26,8 +26,6 @@
 
 #include <rfb/Logger.h>
 
-namespace os { class Mutex; }
-
 namespace rfb {
 
   class Logger_File : public Logger {
@@ -47,7 +45,6 @@ namespace rfb {
     char m_filename[PATH_MAX];
     FILE* m_file;
     time_t m_lastLogTime;
-    os::Mutex* mutex;
   };
 
   bool initFileLogger(const char* filename);