diff --git a/sha256.cpp b/sha256.cpp
diff --git a/util.cpp b/util.cpp
@@ -19,6 +19,14 @@ bool fCommandLine = false;
 
 
 
+// Workaround for "multiple definition of `_tls_used'"
+// http://svn.boost.org/trac/boost/ticket/4258
+extern "C" void tss_cleanup_implemented() { }
+
+
+
+
+
 // Init openssl library multithreading support
 static boost::interprocess::interprocess_mutex** ppmutexOpenSSL;
 void locking_callback(int mode, int i, const char* file, int line)