diff --git a/nemu/src/monitor/sdb/addrexp.y b/nemu/src/monitor/sdb/addrexp.y
index 61ea1e2..43d6c35 100644
--- a/nemu/src/monitor/sdb/addrexp.y
+++ b/nemu/src/monitor/sdb/addrexp.y
@@ -1,6 +1,5 @@
 %code requires { 
     #include <common.h>
-    #include <stdint.h>
     #include <stdio.h>
     #include <stdlib.h>
     extern int yylex(void);