diff --git a/include/linux/debug_locks.h b/include/linux/debug_locks.h
index 493dedb..29b3ce3 100644
--- a/include/linux/debug_locks.h
+++ b/include/linux/debug_locks.h
@@ -3,6 +3,7 @@
 
 #include <linux/kernel.h>
 #include <asm/atomic.h>
+#include <asm/system.h>
 
 struct task_struct;