diff --git a/code/userprog/exception.cc b/code/userprog/exception.cc
index 687f9e2..7dc3e42 100644
--- a/code/userprog/exception.cc
+++ b/code/userprog/exception.cc
@@ -221,6 +221,7 @@ ExceptionHandler (ExceptionType which)
           }
         case SC_ThreadExit:
           {
+            do_ThreadExit();
             break;
           }
         #endif