diff --git a/nemu/src/nemu-main.c b/nemu/src/nemu-main.c
index e5eb30b..4ed86cc 100644
--- a/nemu/src/nemu-main.c
+++ b/nemu/src/nemu-main.c
@@ -34,8 +34,8 @@ int main(int argc, char *argv[]) {
 #endif
 
   /* init boot time */
-  uint64_t get_time();
-  get_time();
+//  uint64_t get_time();
+//  get_time();
   /* Start engine. */
   engine_start();