diff --git a/src/osal/osal.h b/src/osal/osal.h
index 8b7527a7e..16ad34f3c 100644
--- a/src/osal/osal.h
+++ b/src/osal/osal.h
@@ -40,9 +40,10 @@ enum
 {
   OSAL_TIMEOUT_NOTIMEOUT    = 0,      // return immediately
   OSAL_TIMEOUT_NORMAL       = 10,     // default timeout
-  OSAL_TIMEOUT_WAIT_FOREVER = 0xFFFFFFFFUL
 };
 
+static const uint32_t  OSAL_TIMEOUT_WAIT_FOREVER = 0xFFFFFFFFUL;
+
 #define OSAL_TIMEOUT_CONTROL_XFER  OSAL_TIMEOUT_WAIT_FOREVER
 
 typedef void (*osal_task_func_t)( void * );