diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8be5b57..fcc9a5a 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1415,6 +1415,7 @@
 extern unsigned int sysctl_sched_batch_wakeup_granularity;
 extern unsigned int sysctl_sched_child_runs_first;
 extern unsigned int sysctl_sched_features;
+extern unsigned int sysctl_sched_migration_cost;
 #endif
 
 extern unsigned int sysctl_sched_compat_yield;