diff --git a/src/thread/context.hpp b/src/thread/context.hpp
index d7ac57e5b..d5f57ecfd 100644
--- a/src/thread/context.hpp
+++ b/src/thread/context.hpp
@@ -5,7 +5,13 @@
 #include <vector>
 
 #include <boost/version.hpp>
-
+/**   the lib of coroutine of boost version 1.66  
+*    is diffrent to 1.54 and can't support
+*    so I want change it
+* 
+*    I want change it,but it maybe a big project
+*    so I can only compile it by boost_1_54  
+* */
 #if BOOST_VERSION >= 105400
   #include <boost/coroutine/stack_context.hpp>
   #include <boost/coroutine/stack_allocator.hpp>