diff --git a/nemu/src/monitor/sdb/sdb.c b/nemu/src/monitor/sdb/sdb.c
index 725bce8..330d199 100644
--- a/nemu/src/monitor/sdb/sdb.c
+++ b/nemu/src/monitor/sdb/sdb.c
@@ -49,7 +49,7 @@ static int cmd_c(char *args) {
 
 
 static int cmd_q(char *args) {
-  return -1;
+  return 0;
 }
 
 static int cmd_help(char *args);