diff --git a/include/os/osDef.h b/include/os/osDef.h
index 75c6a0dc73..439f4b5c6a 100644
--- a/include/os/osDef.h
+++ b/include/os/osDef.h
@@ -188,9 +188,10 @@ void syslog(int unused, const char *format, ...);
 #define ALIGN8(n) ALIGN_NUM(n, 8)
 
 #undef threadlocal
-#ifdef _ISOC11_SOURCE
-#define threadlocal _Thread_local
-#elif defined(__APPLE__)
+//#ifdef _ISOC11_SOURCE
+//#define threadlocal _Thread_local
+//#elif defined(__APPLE__)
+#if defined(__APPLE__)
 #define threadlocal __thread
 #elif defined(__GNUC__) && !defined(threadlocal)
 #define threadlocal __thread