diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 711c4dc..6efa8c2 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -346,6 +346,7 @@
 enum event_trigger_type {
 	ETT_NONE		= (0),
 	ETT_TRACE_ONOFF		= (1 << 0),
+	ETT_SNAPSHOT		= (1 << 1),
 };
 
 extern void destroy_preds(struct ftrace_event_file *file);