diff --git a/kern/sched.c b/kern/sched.c
index f595bb1..9b3939f 100644
--- a/kern/sched.c
+++ b/kern/sched.c
@@ -74,6 +74,7 @@ sched_halt(void)
 		"movl %0, %%esp\n"
 		"pushl $0\n"
 		"pushl $0\n"
+        // LAB 4:
 		// Uncomment the following line after completing exercise 13
 		//"sti\n"
 		"1:\n"