diff --git a/include/linux/audit.h b/include/linux/audit.h
index 729a4d1..7b31bec 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -73,6 +73,8 @@
 	void				*lsm_rule;
 };
 
+extern int is_audit_feature_set(int which);
+
 extern int __init audit_register_class(int class, unsigned *list);
 extern int audit_classify_syscall(int abi, unsigned syscall);
 extern int audit_classify_arch(int arch);