diff --git a/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.cpp b/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.cpp
index 6737f9db0..68d864d50 100644
--- a/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.cpp
+++ b/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.cpp
@@ -31,7 +31,11 @@ void FatalError::resetReporter (Reporter& reporter)
 
 FatalError::FatalError (char const* message, char const* fileName, int lineNumber)
 {
-    LockType::ScopedLockType lock (m_mutex);
+    typedef CriticalSection LockType;
+
+    static LockType s_mutex;
+
+    LockType::ScopedLockType lock (s_mutex);
 
     String const backtraceString = SystemStats::getStackBacktrace ();
 
diff --git a/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.h b/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.h
index 130524ea0..f65a39ad3 100644
--- a/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.h
+++ b/Subtrees/beast/modules/beast_core/diagnostic/beast_FatalError.h
@@ -87,11 +87,7 @@ public:
     FatalError (char const* message, char const* fileName, int lineNumber);
 
 private:
-    typedef CriticalSection LockType;
-
     static Static::Storage <Atomic <Reporter*>, FatalError> s_reporter;
-
-    LockType m_mutex;
 };
 
 #endif