--- yapet-1.0/yapet/cfg.h	2014-02-23 10:18:41.000000000 -0700
+++ yapet-1.0/yapet/cfg.h	2016-04-14 07:06:49.665672169 -0700
@@ -163,7 +163,7 @@ 
                     locked = false;
                 }
 
-                void is_locked() const {
+                bool is_locked() const {
                     return locked;
                 }