diff --git a/util/thread_local.h b/util/thread_local.h
index 3777ad60d..b935208f1 100644
--- a/util/thread_local.h
+++ b/util/thread_local.h
@@ -18,8 +18,12 @@
 #include "util/autovector.h"
 #include "port/port.h"
 
-#if !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(IOS_CROSS_COMPILE)
-#define ROCKSDB_SUPPORT_THREAD_LOCAL
+#ifndef ROCKSDB_SUPPORT_THREAD_LOCAL
+#  if defined(OS_WIN) || defined(OS_MACOSX) || defined(IOS_CROSS_COMPILE)
+#    define ROCKSDB_SUPPORT_THREAD_LOCAL 0
+#  else
+#    define ROCKSDB_SUPPORT_THREAD_LOCAL 1
+#  endif
 #endif
 
 namespace rocksdb {