diff --git a/include/linux/timer.h b/include/linux/timer.h
index f3dccdb44f95fc43e3f0df93075a98519d760c4b..1794674c1a525328fcd5f1c279c006265100729f 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -54,6 +54,7 @@ extern struct tvec_base boot_tvec_bases;
 		.expires = (_expires),				\
 		.data = (_data),				\
 		.base = &boot_tvec_bases,			\
+		.slack = -1,					\
 		__TIMER_LOCKDEP_MAP_INITIALIZER(		\
 			__FILE__ ":" __stringify(__LINE__))	\
 	}