diff --git a/nemu/src/monitor/sdb/sdb.c b/nemu/src/monitor/sdb/sdb.c
index 725bce8..b2f7341 100644
--- a/nemu/src/monitor/sdb/sdb.c
+++ b/nemu/src/monitor/sdb/sdb.c
@@ -49,6 +49,7 @@ static int cmd_c(char *args) {
 
 
 static int cmd_q(char *args) {
+  nemu_state.state = NEMU_QUIT;
   return -1;
 }