diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index d85455539d5cd8424c281bf6487ee814e91708e3..d62b2882232b7a3017eda9c873de01c7ffcfc4a1 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1290,7 +1290,6 @@ extern void update_max_interval(void);
 extern void init_sched_dl_class(void);
 extern void init_sched_rt_class(void);
 extern void init_sched_fair_class(void);
-extern void init_sched_dl_class(void);
 
 extern void resched_curr(struct rq *rq);
 extern void resched_cpu(int cpu);