nginx-0.0.2-2004-03-02-18:40:59 import
diff --git a/src/os/unix/ngx_thread.h b/src/os/unix/ngx_thread.h
index 8a02880..0b065d8 100644
--- a/src/os/unix/ngx_thread.h
+++ b/src/os/unix/ngx_thread.h
@@ -7,6 +7,8 @@
 
 #if (NGX_THREADS)
 
+#define ngx_thread_volatile  volatile
+
 #if (NGX_USE_RFORK)
 
 #include <sys/ipc.h>
@@ -96,6 +98,8 @@
 
 #else /* !NGX_THREADS */
 
+#define ngx_thread_volatile
+
 #define ngx_log_tid  0
 #define TID_T_FMT    "%d"