diff --git a/include/linux/sched.h b/include/linux/sched.h
index 02042e7..d034210 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -92,7 +92,6 @@ struct sched_param {
 
 #include <asm/processor.h>
 
-struct mem_cgroup;
 struct exec_domain;
 struct futex_pi_state;
 struct robust_list_head;