diff --git a/src/threads/thread.c b/src/threads/thread.c
index b512aee..5a292b5 100644
--- a/src/threads/thread.c
+++ b/src/threads/thread.c
@@ -259,7 +259,6 @@ thread_create (const char *name, int priority,
       return TID_ERROR;
     }
 
-#define USERPROG
 #ifdef USERPROG
   /* Initialize the thread's file descriptor table. */
   t->fd_counter = MINIMUM_USER_FD;