diff --git a/framework/jinux-frame/src/task/switch.S b/framework/jinux-frame/src/task/switch.S
index 9d37c0935..4456f19f1 100644
--- a/framework/jinux-frame/src/task/switch.S
+++ b/framework/jinux-frame/src/task/switch.S
@@ -1,5 +1,6 @@
 .text
 .global context_switch
+.code64
 context_switch: # (cur: *mut TaskContext, nxt: *TaskContext)
   # Save cur's register
   mov rax, [rsp] # return address